diff --git a/Makefile.in b/Makefile.in
index 931c6c55d6..08f9cd64cf 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -436,8 +436,8 @@ ALL_BASE_SOURCES =  \
 	src/common/sckstrm.cpp \
 	src/common/socket.cpp \
 	src/common/url.cpp \
-	src/unix/gsocket.c \
-	src/msw/gsocket.c \
+	src/unix/gsocket.cpp \
+	src/msw/gsocket.cpp \
 	src/msw/urlmsw.cpp \
 	$(NET_WINCE_SRC) \
 	src/xml/xml.cpp \
@@ -8156,8 +8156,8 @@ monodll_bmpmotif.o: $(srcdir)/src/motif/bmpmotif.cpp $(MONODLL_ODEP)
 monodll_combobox_native.o: $(srcdir)/src/motif/combobox_native.cpp $(MONODLL_ODEP)
 	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
-monodll_gsockmot.o: $(srcdir)/src/motif/gsockmot.c $(MONODLL_ODEP)
-	$(CCC) -c -o $@ $(MONODLL_CFLAGS) $<
+monodll_gsockmot.o: $(srcdir)/src/motif/gsockmot.cpp $(MONODLL_ODEP)
+	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
 monodll_xmcombo.o: $(srcdir)/src/motif/xmcombo/xmcombo.c $(MONODLL_ODEP)
 	$(CCC) -c -o $@ $(MONODLL_CFLAGS) $<
@@ -8570,18 +8570,18 @@ monodll_sound_sdl.o: $(srcdir)/src/unix/sound_sdl.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@monodll_main.o: $(srcdir)/src/os2/main.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
-@COND_PLATFORM_UNIX_1@monodll_gsocket.o: $(srcdir)/src/unix/gsocket.c $(MONODLL_ODEP)
-@COND_PLATFORM_UNIX_1@	$(CCC) -c -o $@ $(MONODLL_CFLAGS) $<
+@COND_PLATFORM_UNIX_1@monodll_gsocket.o: $(srcdir)/src/unix/gsocket.cpp $(MONODLL_ODEP)
+@COND_PLATFORM_UNIX_1@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
-@COND_PLATFORM_MACOSX_1@monodll_gsocket.o: $(srcdir)/src/unix/gsocket.c $(MONODLL_ODEP)
-@COND_PLATFORM_MACOSX_1@	$(CCC) -c -o $@ $(MONODLL_CFLAGS) $<
+@COND_PLATFORM_MACOSX_1@monodll_gsocket.o: $(srcdir)/src/unix/gsocket.cpp $(MONODLL_ODEP)
+@COND_PLATFORM_MACOSX_1@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
+
+@COND_PLATFORM_WIN32_1@monodll_gsocket.o: $(srcdir)/src/msw/gsocket.cpp $(MONODLL_ODEP)
+@COND_PLATFORM_WIN32_1@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
 @COND_PLATFORM_OS2_1@monodll_gsocket.o: $(srcdir)/src/unix/gsocket.c $(MONODLL_ODEP)
 @COND_PLATFORM_OS2_1@	$(CCC) -c -o $@ $(MONODLL_CFLAGS) $<
 
-@COND_PLATFORM_WIN32_1@monodll_gsocket.o: $(srcdir)/src/msw/gsocket.c $(MONODLL_ODEP)
-@COND_PLATFORM_WIN32_1@	$(CCC) -c -o $@ $(MONODLL_CFLAGS) $<
-
 @COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@monodll_caret.o: $(srcdir)/src/generic/caret.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
@@ -9110,8 +9110,8 @@ monodll_sound_sdl.o: $(srcdir)/src/unix/sound_sdl.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@monodll_gdiobj.o: $(srcdir)/src/os2/gdiobj.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
-@COND_TOOLKIT_GTK_USE_GUI_1@monodll_gsockgtk.o: $(srcdir)/src/gtk/gsockgtk.c $(MONODLL_ODEP)
-@COND_TOOLKIT_GTK_USE_GUI_1@	$(CCC) -c -o $@ $(MONODLL_CFLAGS) $<
+@COND_TOOLKIT_GTK_USE_GUI_1@monodll_gsockgtk.o: $(srcdir)/src/gtk/gsockgtk.cpp $(MONODLL_ODEP)
+@COND_TOOLKIT_GTK_USE_GUI_1@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
 @COND_TOOLKIT_GTK_USE_GUI_1@monodll_icon.o: $(srcdir)/src/gtk/icon.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_GTK_USE_GUI_1@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
@@ -9416,11 +9416,11 @@ monodll_sound_sdl.o: $(srcdir)/src/unix/sound_sdl.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@monodll_gdiimage.o: $(srcdir)/src/os2/gdiimage.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
-@COND_TOOLKIT_MSW_USE_GUI_1@monodll_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.c $(MONODLL_ODEP)
-@COND_TOOLKIT_MSW_USE_GUI_1@	$(CCC) -c -o $@ $(MONODLL_CFLAGS) $<
+@COND_TOOLKIT_MSW_USE_GUI_1@monodll_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.cpp $(MONODLL_ODEP)
+@COND_TOOLKIT_MSW_USE_GUI_1@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
-@COND_TOOLKIT_WINCE_USE_GUI_1@monodll_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.c $(MONODLL_ODEP)
-@COND_TOOLKIT_WINCE_USE_GUI_1@	$(CCC) -c -o $@ $(MONODLL_CFLAGS) $<
+@COND_TOOLKIT_WINCE_USE_GUI_1@monodll_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.cpp $(MONODLL_ODEP)
+@COND_TOOLKIT_WINCE_USE_GUI_1@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
 @COND_TOOLKIT_MSW_USE_GUI_1@monodll_dropsrc.o: $(srcdir)/src/msw/ole/dropsrc.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_MSW_USE_GUI_1@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
@@ -9503,8 +9503,8 @@ monodll_sound_sdl.o: $(srcdir)/src/unix/sound_sdl.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@monodll_dirdlg.o: $(srcdir)/src/mac/carbon/dirdlg.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
-@COND_TOOLKIT_X11_USE_GUI_1@monodll_gsockx11.o: $(srcdir)/src/x11/gsockx11.c $(MONODLL_ODEP)
-@COND_TOOLKIT_X11_USE_GUI_1@	$(CCC) -c -o $@ $(MONODLL_CFLAGS) $<
+@COND_TOOLKIT_X11_USE_GUI_1@monodll_gsockx11.o: $(srcdir)/src/x11/gsockx11.cpp $(MONODLL_ODEP)
+@COND_TOOLKIT_X11_USE_GUI_1@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
 @COND_TOOLKIT_X11_USE_GUI_1@monodll_nanox.o: $(srcdir)/src/x11/nanox.c $(MONODLL_ODEP)
 @COND_TOOLKIT_X11_USE_GUI_1@	$(CCC) -c -o $@ $(MONODLL_CFLAGS) $<
@@ -10505,11 +10505,11 @@ monodll_sound_sdl.o: $(srcdir)/src/unix/sound_sdl.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@monodll_helpwin.o: $(srcdir)/src/os2/helpwin.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
-@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@monodll_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.c $(MONODLL_ODEP)
-@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CCC) -c -o $@ $(MONODLL_CFLAGS) $<
+@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@monodll_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.cpp $(MONODLL_ODEP)
+@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
-@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@monodll_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.c $(MONODLL_ODEP)
-@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@	$(CCC) -c -o $@ $(MONODLL_CFLAGS) $<
+@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@monodll_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.cpp $(MONODLL_ODEP)
+@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@monodll_mdig.o: $(srcdir)/src/generic/mdig.cpp $(MONODLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONODLL_CXXFLAGS) $<
@@ -11135,8 +11135,8 @@ monolib_bmpmotif.o: $(srcdir)/src/motif/bmpmotif.cpp $(MONOLIB_ODEP)
 monolib_combobox_native.o: $(srcdir)/src/motif/combobox_native.cpp $(MONOLIB_ODEP)
 	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
-monolib_gsockmot.o: $(srcdir)/src/motif/gsockmot.c $(MONOLIB_ODEP)
-	$(CCC) -c -o $@ $(MONOLIB_CFLAGS) $<
+monolib_gsockmot.o: $(srcdir)/src/motif/gsockmot.cpp $(MONOLIB_ODEP)
+	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
 monolib_xmcombo.o: $(srcdir)/src/motif/xmcombo/xmcombo.c $(MONOLIB_ODEP)
 	$(CCC) -c -o $@ $(MONOLIB_CFLAGS) $<
@@ -11549,18 +11549,18 @@ monolib_sound_sdl.o: $(srcdir)/src/unix/sound_sdl.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@monolib_main.o: $(srcdir)/src/os2/main.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
-@COND_PLATFORM_UNIX_1@monolib_gsocket.o: $(srcdir)/src/unix/gsocket.c $(MONOLIB_ODEP)
-@COND_PLATFORM_UNIX_1@	$(CCC) -c -o $@ $(MONOLIB_CFLAGS) $<
+@COND_PLATFORM_UNIX_1@monolib_gsocket.o: $(srcdir)/src/unix/gsocket.cpp $(MONOLIB_ODEP)
+@COND_PLATFORM_UNIX_1@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
-@COND_PLATFORM_MACOSX_1@monolib_gsocket.o: $(srcdir)/src/unix/gsocket.c $(MONOLIB_ODEP)
-@COND_PLATFORM_MACOSX_1@	$(CCC) -c -o $@ $(MONOLIB_CFLAGS) $<
+@COND_PLATFORM_MACOSX_1@monolib_gsocket.o: $(srcdir)/src/unix/gsocket.cpp $(MONOLIB_ODEP)
+@COND_PLATFORM_MACOSX_1@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
+
+@COND_PLATFORM_WIN32_1@monolib_gsocket.o: $(srcdir)/src/msw/gsocket.cpp $(MONOLIB_ODEP)
+@COND_PLATFORM_WIN32_1@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
 @COND_PLATFORM_OS2_1@monolib_gsocket.o: $(srcdir)/src/unix/gsocket.c $(MONOLIB_ODEP)
 @COND_PLATFORM_OS2_1@	$(CCC) -c -o $@ $(MONOLIB_CFLAGS) $<
 
-@COND_PLATFORM_WIN32_1@monolib_gsocket.o: $(srcdir)/src/msw/gsocket.c $(MONOLIB_ODEP)
-@COND_PLATFORM_WIN32_1@	$(CCC) -c -o $@ $(MONOLIB_CFLAGS) $<
-
 @COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@monolib_caret.o: $(srcdir)/src/generic/caret.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
@@ -12089,8 +12089,8 @@ monolib_sound_sdl.o: $(srcdir)/src/unix/sound_sdl.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@monolib_gdiobj.o: $(srcdir)/src/os2/gdiobj.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
-@COND_TOOLKIT_GTK_USE_GUI_1@monolib_gsockgtk.o: $(srcdir)/src/gtk/gsockgtk.c $(MONOLIB_ODEP)
-@COND_TOOLKIT_GTK_USE_GUI_1@	$(CCC) -c -o $@ $(MONOLIB_CFLAGS) $<
+@COND_TOOLKIT_GTK_USE_GUI_1@monolib_gsockgtk.o: $(srcdir)/src/gtk/gsockgtk.cpp $(MONOLIB_ODEP)
+@COND_TOOLKIT_GTK_USE_GUI_1@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
 @COND_TOOLKIT_GTK_USE_GUI_1@monolib_icon.o: $(srcdir)/src/gtk/icon.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_GTK_USE_GUI_1@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
@@ -12395,11 +12395,11 @@ monolib_sound_sdl.o: $(srcdir)/src/unix/sound_sdl.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@monolib_gdiimage.o: $(srcdir)/src/os2/gdiimage.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
-@COND_TOOLKIT_MSW_USE_GUI_1@monolib_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.c $(MONOLIB_ODEP)
-@COND_TOOLKIT_MSW_USE_GUI_1@	$(CCC) -c -o $@ $(MONOLIB_CFLAGS) $<
+@COND_TOOLKIT_MSW_USE_GUI_1@monolib_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.cpp $(MONOLIB_ODEP)
+@COND_TOOLKIT_MSW_USE_GUI_1@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
-@COND_TOOLKIT_WINCE_USE_GUI_1@monolib_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.c $(MONOLIB_ODEP)
-@COND_TOOLKIT_WINCE_USE_GUI_1@	$(CCC) -c -o $@ $(MONOLIB_CFLAGS) $<
+@COND_TOOLKIT_WINCE_USE_GUI_1@monolib_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.cpp $(MONOLIB_ODEP)
+@COND_TOOLKIT_WINCE_USE_GUI_1@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
 @COND_TOOLKIT_MSW_USE_GUI_1@monolib_dropsrc.o: $(srcdir)/src/msw/ole/dropsrc.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_MSW_USE_GUI_1@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
@@ -12482,8 +12482,8 @@ monolib_sound_sdl.o: $(srcdir)/src/unix/sound_sdl.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@monolib_dirdlg.o: $(srcdir)/src/mac/carbon/dirdlg.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
-@COND_TOOLKIT_X11_USE_GUI_1@monolib_gsockx11.o: $(srcdir)/src/x11/gsockx11.c $(MONOLIB_ODEP)
-@COND_TOOLKIT_X11_USE_GUI_1@	$(CCC) -c -o $@ $(MONOLIB_CFLAGS) $<
+@COND_TOOLKIT_X11_USE_GUI_1@monolib_gsockx11.o: $(srcdir)/src/x11/gsockx11.cpp $(MONOLIB_ODEP)
+@COND_TOOLKIT_X11_USE_GUI_1@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
 @COND_TOOLKIT_X11_USE_GUI_1@monolib_nanox.o: $(srcdir)/src/x11/nanox.c $(MONOLIB_ODEP)
 @COND_TOOLKIT_X11_USE_GUI_1@	$(CCC) -c -o $@ $(MONOLIB_CFLAGS) $<
@@ -13484,11 +13484,11 @@ monolib_sound_sdl.o: $(srcdir)/src/unix/sound_sdl.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@monolib_helpwin.o: $(srcdir)/src/os2/helpwin.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
-@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@monolib_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.c $(MONOLIB_ODEP)
-@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CCC) -c -o $@ $(MONOLIB_CFLAGS) $<
+@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@monolib_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.cpp $(MONOLIB_ODEP)
+@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
-@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@monolib_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.c $(MONOLIB_ODEP)
-@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@	$(CCC) -c -o $@ $(MONOLIB_CFLAGS) $<
+@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@monolib_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.cpp $(MONOLIB_ODEP)
+@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@monolib_mdig.o: $(srcdir)/src/generic/mdig.cpp $(MONOLIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(MONOLIB_CXXFLAGS) $<
@@ -14564,18 +14564,18 @@ netdll_urlmsw.o: $(srcdir)/src/msw/urlmsw.cpp $(NETDLL_ODEP)
 netdll_net.o: $(srcdir)/src/msw/wince/net.cpp $(NETDLL_ODEP)
 	$(CXXC) -c -o $@ $(NETDLL_CXXFLAGS) $<
 
-@COND_PLATFORM_UNIX_1@netdll_gsocket.o: $(srcdir)/src/unix/gsocket.c $(NETDLL_ODEP)
-@COND_PLATFORM_UNIX_1@	$(CCC) -c -o $@ $(NETDLL_CFLAGS) $<
+@COND_PLATFORM_UNIX_1@netdll_gsocket.o: $(srcdir)/src/unix/gsocket.cpp $(NETDLL_ODEP)
+@COND_PLATFORM_UNIX_1@	$(CXXC) -c -o $@ $(NETDLL_CXXFLAGS) $<
 
-@COND_PLATFORM_MACOSX_1@netdll_gsocket.o: $(srcdir)/src/unix/gsocket.c $(NETDLL_ODEP)
-@COND_PLATFORM_MACOSX_1@	$(CCC) -c -o $@ $(NETDLL_CFLAGS) $<
+@COND_PLATFORM_MACOSX_1@netdll_gsocket.o: $(srcdir)/src/unix/gsocket.cpp $(NETDLL_ODEP)
+@COND_PLATFORM_MACOSX_1@	$(CXXC) -c -o $@ $(NETDLL_CXXFLAGS) $<
+
+@COND_PLATFORM_WIN32_1@netdll_gsocket.o: $(srcdir)/src/msw/gsocket.cpp $(NETDLL_ODEP)
+@COND_PLATFORM_WIN32_1@	$(CXXC) -c -o $@ $(NETDLL_CXXFLAGS) $<
 
 @COND_PLATFORM_OS2_1@netdll_gsocket.o: $(srcdir)/src/unix/gsocket.c $(NETDLL_ODEP)
 @COND_PLATFORM_OS2_1@	$(CCC) -c -o $@ $(NETDLL_CFLAGS) $<
 
-@COND_PLATFORM_WIN32_1@netdll_gsocket.o: $(srcdir)/src/msw/gsocket.c $(NETDLL_ODEP)
-@COND_PLATFORM_WIN32_1@	$(CCC) -c -o $@ $(NETDLL_CFLAGS) $<
-
 netlib_fs_inet.o: $(srcdir)/src/common/fs_inet.cpp $(NETLIB_ODEP)
 	$(CXXC) -c -o $@ $(NETLIB_CXXFLAGS) $<
 
@@ -14612,18 +14612,18 @@ netlib_urlmsw.o: $(srcdir)/src/msw/urlmsw.cpp $(NETLIB_ODEP)
 netlib_net.o: $(srcdir)/src/msw/wince/net.cpp $(NETLIB_ODEP)
 	$(CXXC) -c -o $@ $(NETLIB_CXXFLAGS) $<
 
-@COND_PLATFORM_UNIX_1@netlib_gsocket.o: $(srcdir)/src/unix/gsocket.c $(NETLIB_ODEP)
-@COND_PLATFORM_UNIX_1@	$(CCC) -c -o $@ $(NETLIB_CFLAGS) $<
+@COND_PLATFORM_UNIX_1@netlib_gsocket.o: $(srcdir)/src/unix/gsocket.cpp $(NETLIB_ODEP)
+@COND_PLATFORM_UNIX_1@	$(CXXC) -c -o $@ $(NETLIB_CXXFLAGS) $<
 
-@COND_PLATFORM_MACOSX_1@netlib_gsocket.o: $(srcdir)/src/unix/gsocket.c $(NETLIB_ODEP)
-@COND_PLATFORM_MACOSX_1@	$(CCC) -c -o $@ $(NETLIB_CFLAGS) $<
+@COND_PLATFORM_MACOSX_1@netlib_gsocket.o: $(srcdir)/src/unix/gsocket.cpp $(NETLIB_ODEP)
+@COND_PLATFORM_MACOSX_1@	$(CXXC) -c -o $@ $(NETLIB_CXXFLAGS) $<
+
+@COND_PLATFORM_WIN32_1@netlib_gsocket.o: $(srcdir)/src/msw/gsocket.cpp $(NETLIB_ODEP)
+@COND_PLATFORM_WIN32_1@	$(CXXC) -c -o $@ $(NETLIB_CXXFLAGS) $<
 
 @COND_PLATFORM_OS2_1@netlib_gsocket.o: $(srcdir)/src/unix/gsocket.c $(NETLIB_ODEP)
 @COND_PLATFORM_OS2_1@	$(CCC) -c -o $@ $(NETLIB_CFLAGS) $<
 
-@COND_PLATFORM_WIN32_1@netlib_gsocket.o: $(srcdir)/src/msw/gsocket.c $(NETLIB_ODEP)
-@COND_PLATFORM_WIN32_1@	$(CCC) -c -o $@ $(NETLIB_CFLAGS) $<
-
 coredll_event.o: $(srcdir)/src/common/event.cpp $(COREDLL_ODEP)
 	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
@@ -14660,8 +14660,8 @@ coredll_bmpmotif.o: $(srcdir)/src/motif/bmpmotif.cpp $(COREDLL_ODEP)
 coredll_combobox_native.o: $(srcdir)/src/motif/combobox_native.cpp $(COREDLL_ODEP)
 	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
-coredll_gsockmot.o: $(srcdir)/src/motif/gsockmot.c $(COREDLL_ODEP)
-	$(CCC) -c -o $@ $(COREDLL_CFLAGS) $<
+coredll_gsockmot.o: $(srcdir)/src/motif/gsockmot.cpp $(COREDLL_ODEP)
+	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
 coredll_xmcombo.o: $(srcdir)/src/motif/xmcombo/xmcombo.c $(COREDLL_ODEP)
 	$(CCC) -c -o $@ $(COREDLL_CFLAGS) $<
@@ -15368,8 +15368,8 @@ coredll_win32.o: $(srcdir)/src/univ/themes/win32.cpp $(COREDLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@coredll_gdiobj.o: $(srcdir)/src/os2/gdiobj.cpp $(COREDLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
-@COND_TOOLKIT_GTK_USE_GUI_1@coredll_gsockgtk.o: $(srcdir)/src/gtk/gsockgtk.c $(COREDLL_ODEP)
-@COND_TOOLKIT_GTK_USE_GUI_1@	$(CCC) -c -o $@ $(COREDLL_CFLAGS) $<
+@COND_TOOLKIT_GTK_USE_GUI_1@coredll_gsockgtk.o: $(srcdir)/src/gtk/gsockgtk.cpp $(COREDLL_ODEP)
+@COND_TOOLKIT_GTK_USE_GUI_1@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
 @COND_TOOLKIT_GTK_USE_GUI_1@coredll_icon.o: $(srcdir)/src/gtk/icon.cpp $(COREDLL_ODEP)
 @COND_TOOLKIT_GTK_USE_GUI_1@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
@@ -15674,11 +15674,11 @@ coredll_win32.o: $(srcdir)/src/univ/themes/win32.cpp $(COREDLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@coredll_gdiimage.o: $(srcdir)/src/os2/gdiimage.cpp $(COREDLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
-@COND_TOOLKIT_MSW_USE_GUI_1@coredll_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.c $(COREDLL_ODEP)
-@COND_TOOLKIT_MSW_USE_GUI_1@	$(CCC) -c -o $@ $(COREDLL_CFLAGS) $<
+@COND_TOOLKIT_MSW_USE_GUI_1@coredll_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.cpp $(COREDLL_ODEP)
+@COND_TOOLKIT_MSW_USE_GUI_1@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
-@COND_TOOLKIT_WINCE_USE_GUI_1@coredll_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.c $(COREDLL_ODEP)
-@COND_TOOLKIT_WINCE_USE_GUI_1@	$(CCC) -c -o $@ $(COREDLL_CFLAGS) $<
+@COND_TOOLKIT_WINCE_USE_GUI_1@coredll_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.cpp $(COREDLL_ODEP)
+@COND_TOOLKIT_WINCE_USE_GUI_1@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
 @COND_TOOLKIT_MSW_USE_GUI_1@coredll_dropsrc.o: $(srcdir)/src/msw/ole/dropsrc.cpp $(COREDLL_ODEP)
 @COND_TOOLKIT_MSW_USE_GUI_1@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
@@ -15761,8 +15761,8 @@ coredll_win32.o: $(srcdir)/src/univ/themes/win32.cpp $(COREDLL_ODEP)
 @COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@coredll_dirdlg.o: $(srcdir)/src/mac/carbon/dirdlg.cpp $(COREDLL_ODEP)
 @COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
-@COND_TOOLKIT_X11_USE_GUI_1@coredll_gsockx11.o: $(srcdir)/src/x11/gsockx11.c $(COREDLL_ODEP)
-@COND_TOOLKIT_X11_USE_GUI_1@	$(CCC) -c -o $@ $(COREDLL_CFLAGS) $<
+@COND_TOOLKIT_X11_USE_GUI_1@coredll_gsockx11.o: $(srcdir)/src/x11/gsockx11.cpp $(COREDLL_ODEP)
+@COND_TOOLKIT_X11_USE_GUI_1@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
 @COND_TOOLKIT_X11_USE_GUI_1@coredll_nanox.o: $(srcdir)/src/x11/nanox.c $(COREDLL_ODEP)
 @COND_TOOLKIT_X11_USE_GUI_1@	$(CCC) -c -o $@ $(COREDLL_CFLAGS) $<
@@ -16763,11 +16763,11 @@ coredll_win32.o: $(srcdir)/src/univ/themes/win32.cpp $(COREDLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@coredll_helpwin.o: $(srcdir)/src/os2/helpwin.cpp $(COREDLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
-@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@coredll_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.c $(COREDLL_ODEP)
-@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CCC) -c -o $@ $(COREDLL_CFLAGS) $<
+@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@coredll_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.cpp $(COREDLL_ODEP)
+@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
-@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@coredll_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.c $(COREDLL_ODEP)
-@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@	$(CCC) -c -o $@ $(COREDLL_CFLAGS) $<
+@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@coredll_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.cpp $(COREDLL_ODEP)
+@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
 
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@coredll_mdig.o: $(srcdir)/src/generic/mdig.cpp $(COREDLL_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(COREDLL_CXXFLAGS) $<
@@ -17093,8 +17093,8 @@ corelib_bmpmotif.o: $(srcdir)/src/motif/bmpmotif.cpp $(CORELIB_ODEP)
 corelib_combobox_native.o: $(srcdir)/src/motif/combobox_native.cpp $(CORELIB_ODEP)
 	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
-corelib_gsockmot.o: $(srcdir)/src/motif/gsockmot.c $(CORELIB_ODEP)
-	$(CCC) -c -o $@ $(CORELIB_CFLAGS) $<
+corelib_gsockmot.o: $(srcdir)/src/motif/gsockmot.cpp $(CORELIB_ODEP)
+	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
 corelib_xmcombo.o: $(srcdir)/src/motif/xmcombo/xmcombo.c $(CORELIB_ODEP)
 	$(CCC) -c -o $@ $(CORELIB_CFLAGS) $<
@@ -17801,8 +17801,8 @@ corelib_win32.o: $(srcdir)/src/univ/themes/win32.cpp $(CORELIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@corelib_gdiobj.o: $(srcdir)/src/os2/gdiobj.cpp $(CORELIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
-@COND_TOOLKIT_GTK_USE_GUI_1@corelib_gsockgtk.o: $(srcdir)/src/gtk/gsockgtk.c $(CORELIB_ODEP)
-@COND_TOOLKIT_GTK_USE_GUI_1@	$(CCC) -c -o $@ $(CORELIB_CFLAGS) $<
+@COND_TOOLKIT_GTK_USE_GUI_1@corelib_gsockgtk.o: $(srcdir)/src/gtk/gsockgtk.cpp $(CORELIB_ODEP)
+@COND_TOOLKIT_GTK_USE_GUI_1@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
 @COND_TOOLKIT_GTK_USE_GUI_1@corelib_icon.o: $(srcdir)/src/gtk/icon.cpp $(CORELIB_ODEP)
 @COND_TOOLKIT_GTK_USE_GUI_1@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
@@ -18107,11 +18107,11 @@ corelib_win32.o: $(srcdir)/src/univ/themes/win32.cpp $(CORELIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@corelib_gdiimage.o: $(srcdir)/src/os2/gdiimage.cpp $(CORELIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
-@COND_TOOLKIT_MSW_USE_GUI_1@corelib_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.c $(CORELIB_ODEP)
-@COND_TOOLKIT_MSW_USE_GUI_1@	$(CCC) -c -o $@ $(CORELIB_CFLAGS) $<
+@COND_TOOLKIT_MSW_USE_GUI_1@corelib_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.cpp $(CORELIB_ODEP)
+@COND_TOOLKIT_MSW_USE_GUI_1@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
-@COND_TOOLKIT_WINCE_USE_GUI_1@corelib_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.c $(CORELIB_ODEP)
-@COND_TOOLKIT_WINCE_USE_GUI_1@	$(CCC) -c -o $@ $(CORELIB_CFLAGS) $<
+@COND_TOOLKIT_WINCE_USE_GUI_1@corelib_gsockmsw.o: $(srcdir)/src/msw/gsockmsw.cpp $(CORELIB_ODEP)
+@COND_TOOLKIT_WINCE_USE_GUI_1@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
 @COND_TOOLKIT_MSW_USE_GUI_1@corelib_dropsrc.o: $(srcdir)/src/msw/ole/dropsrc.cpp $(CORELIB_ODEP)
 @COND_TOOLKIT_MSW_USE_GUI_1@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
@@ -18194,8 +18194,8 @@ corelib_win32.o: $(srcdir)/src/univ/themes/win32.cpp $(CORELIB_ODEP)
 @COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@corelib_dirdlg.o: $(srcdir)/src/mac/carbon/dirdlg.cpp $(CORELIB_ODEP)
 @COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
-@COND_TOOLKIT_X11_USE_GUI_1@corelib_gsockx11.o: $(srcdir)/src/x11/gsockx11.c $(CORELIB_ODEP)
-@COND_TOOLKIT_X11_USE_GUI_1@	$(CCC) -c -o $@ $(CORELIB_CFLAGS) $<
+@COND_TOOLKIT_X11_USE_GUI_1@corelib_gsockx11.o: $(srcdir)/src/x11/gsockx11.cpp $(CORELIB_ODEP)
+@COND_TOOLKIT_X11_USE_GUI_1@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
 @COND_TOOLKIT_X11_USE_GUI_1@corelib_nanox.o: $(srcdir)/src/x11/nanox.c $(CORELIB_ODEP)
 @COND_TOOLKIT_X11_USE_GUI_1@	$(CCC) -c -o $@ $(CORELIB_CFLAGS) $<
@@ -19196,11 +19196,11 @@ corelib_win32.o: $(srcdir)/src/univ/themes/win32.cpp $(CORELIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@corelib_helpwin.o: $(srcdir)/src/os2/helpwin.cpp $(CORELIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
-@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@corelib_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.c $(CORELIB_ODEP)
-@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CCC) -c -o $@ $(CORELIB_CFLAGS) $<
+@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@corelib_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.cpp $(CORELIB_ODEP)
+@COND_TOOLKIT_MAC_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
-@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@corelib_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.c $(CORELIB_ODEP)
-@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@	$(CCC) -c -o $@ $(CORELIB_CFLAGS) $<
+@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@corelib_gsockosx.o: $(srcdir)/src/mac/carbon/gsockosx.cpp $(CORELIB_ODEP)
+@COND_TOOLKIT_COCOA_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
 
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@corelib_mdig.o: $(srcdir)/src/generic/mdig.cpp $(CORELIB_ODEP)
 @COND_TOOLKIT_PM_USE_GUI_1_WXUNIV_0@	$(CXXC) -c -o $@ $(CORELIB_CXXFLAGS) $<
diff --git a/build/bakefiles/files.bkl b/build/bakefiles/files.bkl
index ce69a56bf8..17201d03d9 100644
--- a/build/bakefiles/files.bkl
+++ b/build/bakefiles/files.bkl
@@ -307,14 +307,14 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
 <!-- ====================================================================== -->
 
 <set var="NET_UNIX_SRC" hints="files">
-    src/unix/gsocket.c
+    src/unix/gsocket.cpp
 </set>
 <set var="NET_UNIX_HDR" hints="files">
     wx/unix/gsockunx.h
 </set>
 
 <set var="NET_WIN32_SRC" hints="files">
-    src/msw/gsocket.c
+    src/msw/gsocket.cpp
     src/msw/urlmsw.cpp
 </set>
 <set var="NET_WIN32_HDR" hints="files">
@@ -329,7 +329,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
 </set>
 
 <set var="NET_DARWIN_SRC" hints="files">
-    src/unix/gsocket.c
+    src/unix/gsocket.cpp
 </set>
 <set var="NET_DARWIN_HDR" hints="files">
     wx/unix/gsockunx.h
@@ -686,7 +686,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
     src/gtk/evtloop.cpp
     src/gtk/font.cpp
     src/gtk/gdiobj.cpp
-    src/gtk/gsockgtk.c
+    src/gtk/gsockgtk.cpp
     src/gtk/icon.cpp
     src/gtk/main.cpp
     src/gtk/minifram.cpp
@@ -873,7 +873,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
     src/motif/frame.cpp
     src/motif/gauge.cpp
     src/motif/gdiobj.cpp
-    src/motif/gsockmot.c
+    src/motif/gsockmot.cpp
     src/motif/icon.cpp
     src/motif/listbox.cpp
     src/motif/main.cpp
@@ -1005,7 +1005,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
     src/x11/evtloop.cpp
     src/x11/font.cpp
     src/x11/gdiobj.cpp
-    src/x11/gsockx11.c
+    src/x11/gsockx11.cpp
     src/x11/icon.cpp
     src/x11/main.cpp
     src/x11/minifram.cpp
@@ -1085,7 +1085,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
     src/msw/fontutil.cpp
     src/msw/gdiimage.cpp
     src/msw/gdiobj.cpp
-    src/msw/gsockmsw.c
+    src/msw/gsockmsw.cpp
     src/msw/icon.cpp
     src/msw/minifram.cpp
     src/msw/ole/dataobj.cpp
@@ -1606,7 +1606,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
     src/mac/carbon/frame.cpp
     src/mac/carbon/gauge.cpp
     src/mac/carbon/gdiobj.cpp
-    src/mac/carbon/gsockosx.c
+    src/mac/carbon/gsockosx.cpp
     src/mac/carbon/icon.cpp
     src/mac/carbon/listbox.cpp
     src/mac/carbon/mdi.cpp
@@ -1928,7 +1928,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
     src/generic/tabg.cpp
     src/generic/timer.cpp
     <!-- wxMac stuff used by wxCocoa: -->
-    src/mac/carbon/gsockosx.c
+    src/mac/carbon/gsockosx.cpp
 </set>
 <set var="COCOA_HDR" hints="files">
     wx/cocoa/NSApplication.h
diff --git a/build/msw/makefile.bcc b/build/msw/makefile.bcc
index e998e71dd8..28b123d085 100644
--- a/build/msw/makefile.bcc
+++ b/build/msw/makefile.bcc
@@ -536,12 +536,6 @@ BASELIB_OBJECTS =  \
 	$(OBJS)\baselib_main.obj \
 	$(OBJS)\baselib_mslu.obj \
 	$(OBJS)\baselib_volume.obj
-NETDLL_CFLAGS = $(__RUNTIME_LIBS) -I$(BCCDIR)\include $(__DEBUGINFO) \
-	$(__OPTIMIZEFLAG) -tWM -D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) \
-	$(__UNICODE_DEFINE_p) -I..\..\include -I$(SETUPHDIR) -I..\..\src\tiff \
-	-I..\..\src\jpeg -I..\..\src\png -I..\..\src\zlib -I..\..\src\regex \
-	-I..\..\src\expat\lib -DwxUSE_GUI=0 -DWXUSINGDLL -DWXMAKINGDLL_NET \
-	$(CPPFLAGS) $(CFLAGS)
 NETDLL_CXXFLAGS = $(__RUNTIME_LIBS) -I$(BCCDIR)\include $(__DEBUGINFO) \
 	$(__OPTIMIZEFLAG) -tWM -D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) \
 	$(__UNICODE_DEFINE_p) -I..\..\include -I$(SETUPHDIR) -I..\..\src\tiff \
@@ -562,11 +556,6 @@ NETDLL_OBJECTS =  \
 	$(OBJS)\netdll_url.obj \
 	$(OBJS)\netdll_gsocket.obj \
 	$(OBJS)\netdll_urlmsw.obj
-NETLIB_CFLAGS = $(__RUNTIME_LIBS) -I$(BCCDIR)\include $(__DEBUGINFO) \
-	$(__OPTIMIZEFLAG) -tWM -D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) \
-	$(__UNICODE_DEFINE_p) -I..\..\include -I$(SETUPHDIR) -I..\..\src\tiff \
-	-I..\..\src\jpeg -I..\..\src\png -I..\..\src\zlib -I..\..\src\regex \
-	-I..\..\src\expat\lib -DwxUSE_GUI=0 $(CPPFLAGS) $(CFLAGS)
 NETLIB_CXXFLAGS = $(__RUNTIME_LIBS) -I$(BCCDIR)\include $(__DEBUGINFO) \
 	$(__OPTIMIZEFLAG) -tWM -D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) \
 	$(__UNICODE_DEFINE_p) -I..\..\include -I$(SETUPHDIR) -I..\..\src\tiff \
@@ -587,12 +576,6 @@ NETLIB_OBJECTS =  \
 	$(OBJS)\netlib_url.obj \
 	$(OBJS)\netlib_gsocket.obj \
 	$(OBJS)\netlib_urlmsw.obj
-COREDLL_CFLAGS = $(__RUNTIME_LIBS) -I$(BCCDIR)\include $(__DEBUGINFO) \
-	$(__OPTIMIZEFLAG) -tWM -D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) \
-	$(__UNICODE_DEFINE_p) -I..\..\include -I$(SETUPHDIR) -I..\..\src\tiff \
-	-I..\..\src\jpeg -I..\..\src\png -I..\..\src\zlib -I..\..\src\regex \
-	-I..\..\src\expat\lib -DWXUSINGDLL -DWXMAKINGDLL_CORE -DwxUSE_BASE=0 \
-	$(CPPFLAGS) $(CFLAGS)
 COREDLL_CXXFLAGS = $(__RUNTIME_LIBS) -I$(BCCDIR)\include $(__DEBUGINFO) \
 	$(__OPTIMIZEFLAG) -tWM -D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) \
 	$(__UNICODE_DEFINE_p) -I..\..\include -I$(SETUPHDIR) -I..\..\src\tiff \
@@ -609,11 +592,6 @@ COREDLL_OBJECTS =  \
 	$(OBJS)\coredll_mslu.obj \
 	$(OBJS)\coredll_volume.obj \
 	$(____CORE_SRC_FILENAMES_2_OBJECTS)
-CORELIB_CFLAGS = $(__RUNTIME_LIBS) -I$(BCCDIR)\include $(__DEBUGINFO) \
-	$(__OPTIMIZEFLAG) -tWM -D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) \
-	$(__UNICODE_DEFINE_p) -I..\..\include -I$(SETUPHDIR) -I..\..\src\tiff \
-	-I..\..\src\jpeg -I..\..\src\png -I..\..\src\zlib -I..\..\src\regex \
-	-I..\..\src\expat\lib -DwxUSE_BASE=0 $(CPPFLAGS) $(CFLAGS)
 CORELIB_CXXFLAGS = $(__RUNTIME_LIBS) -I$(BCCDIR)\include $(__DEBUGINFO) \
 	$(__OPTIMIZEFLAG) -tWM -D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) \
 	$(__UNICODE_DEFINE_p) -I..\..\include -I$(SETUPHDIR) -I..\..\src\tiff \
@@ -3589,8 +3567,8 @@ $(OBJS)\monodll_socket.obj: ..\..\src\common\socket.cpp
 $(OBJS)\monodll_url.obj: ..\..\src\common\url.cpp
 	$(CXX) -q -c -P -o$@ $(MONODLL_CXXFLAGS) $**
 
-$(OBJS)\monodll_gsocket.obj: ..\..\src\msw\gsocket.c
-	$(CC) -q -c -P- -o$@ $(MONODLL_CFLAGS) $**
+$(OBJS)\monodll_gsocket.obj: ..\..\src\msw\gsocket.cpp
+	$(CXX) -q -c -P -o$@ $(MONODLL_CXXFLAGS) $**
 
 $(OBJS)\monodll_urlmsw.obj: ..\..\src\msw\urlmsw.cpp
 	$(CXX) -q -c -P -o$@ $(MONODLL_CXXFLAGS) $**
@@ -3972,8 +3950,8 @@ $(OBJS)\monodll_gdiobj.obj: ..\..\src\msw\gdiobj.cpp
 !endif
 
 !if "$(USE_GUI)" == "1"
-$(OBJS)\monodll_gsockmsw.obj: ..\..\src\msw\gsockmsw.c
-	$(CC) -q -c -P- -o$@ $(MONODLL_CFLAGS) $**
+$(OBJS)\monodll_gsockmsw.obj: ..\..\src\msw\gsockmsw.cpp
+	$(CXX) -q -c -P -o$@ $(MONODLL_CXXFLAGS) $**
 !endif
 
 !if "$(USE_GUI)" == "1"
@@ -5059,8 +5037,8 @@ $(OBJS)\monolib_socket.obj: ..\..\src\common\socket.cpp
 $(OBJS)\monolib_url.obj: ..\..\src\common\url.cpp
 	$(CXX) -q -c -P -o$@ $(MONOLIB_CXXFLAGS) $**
 
-$(OBJS)\monolib_gsocket.obj: ..\..\src\msw\gsocket.c
-	$(CC) -q -c -P- -o$@ $(MONOLIB_CFLAGS) $**
+$(OBJS)\monolib_gsocket.obj: ..\..\src\msw\gsocket.cpp
+	$(CXX) -q -c -P -o$@ $(MONOLIB_CXXFLAGS) $**
 
 $(OBJS)\monolib_urlmsw.obj: ..\..\src\msw\urlmsw.cpp
 	$(CXX) -q -c -P -o$@ $(MONOLIB_CXXFLAGS) $**
@@ -5442,8 +5420,8 @@ $(OBJS)\monolib_gdiobj.obj: ..\..\src\msw\gdiobj.cpp
 !endif
 
 !if "$(USE_GUI)" == "1"
-$(OBJS)\monolib_gsockmsw.obj: ..\..\src\msw\gsockmsw.c
-	$(CC) -q -c -P- -o$@ $(MONOLIB_CFLAGS) $**
+$(OBJS)\monolib_gsockmsw.obj: ..\..\src\msw\gsockmsw.cpp
+	$(CXX) -q -c -P -o$@ $(MONOLIB_CXXFLAGS) $**
 !endif
 
 !if "$(USE_GUI)" == "1"
@@ -6745,8 +6723,8 @@ $(OBJS)\netdll_socket.obj: ..\..\src\common\socket.cpp
 $(OBJS)\netdll_url.obj: ..\..\src\common\url.cpp
 	$(CXX) -q -c -P -o$@ $(NETDLL_CXXFLAGS) $**
 
-$(OBJS)\netdll_gsocket.obj: ..\..\src\msw\gsocket.c
-	$(CC) -q -c -P- -o$@ $(NETDLL_CFLAGS) $**
+$(OBJS)\netdll_gsocket.obj: ..\..\src\msw\gsocket.cpp
+	$(CXX) -q -c -P -o$@ $(NETDLL_CXXFLAGS) $**
 
 $(OBJS)\netdll_urlmsw.obj: ..\..\src\msw\urlmsw.cpp
 	$(CXX) -q -c -P -o$@ $(NETDLL_CXXFLAGS) $**
@@ -6784,8 +6762,8 @@ $(OBJS)\netlib_socket.obj: ..\..\src\common\socket.cpp
 $(OBJS)\netlib_url.obj: ..\..\src\common\url.cpp
 	$(CXX) -q -c -P -o$@ $(NETLIB_CXXFLAGS) $**
 
-$(OBJS)\netlib_gsocket.obj: ..\..\src\msw\gsocket.c
-	$(CC) -q -c -P- -o$@ $(NETLIB_CFLAGS) $**
+$(OBJS)\netlib_gsocket.obj: ..\..\src\msw\gsocket.cpp
+	$(CXX) -q -c -P -o$@ $(NETLIB_CXXFLAGS) $**
 
 $(OBJS)\netlib_urlmsw.obj: ..\..\src\msw\urlmsw.cpp
 	$(CXX) -q -c -P -o$@ $(NETLIB_CXXFLAGS) $**
@@ -7068,8 +7046,8 @@ $(OBJS)\coredll_gdiobj.obj: ..\..\src\msw\gdiobj.cpp
 !endif
 
 !if "$(USE_GUI)" == "1"
-$(OBJS)\coredll_gsockmsw.obj: ..\..\src\msw\gsockmsw.c
-	$(CC) -q -c -P- -o$@ $(COREDLL_CFLAGS) $**
+$(OBJS)\coredll_gsockmsw.obj: ..\..\src\msw\gsockmsw.cpp
+	$(CXX) -q -c -P -o$@ $(COREDLL_CXXFLAGS) $**
 !endif
 
 !if "$(USE_GUI)" == "1"
@@ -8190,8 +8168,8 @@ $(OBJS)\corelib_gdiobj.obj: ..\..\src\msw\gdiobj.cpp
 !endif
 
 !if "$(USE_GUI)" == "1"
-$(OBJS)\corelib_gsockmsw.obj: ..\..\src\msw\gsockmsw.c
-	$(CC) -q -c -P- -o$@ $(CORELIB_CFLAGS) $**
+$(OBJS)\corelib_gsockmsw.obj: ..\..\src\msw\gsockmsw.cpp
+	$(CXX) -q -c -P -o$@ $(CORELIB_CXXFLAGS) $**
 !endif
 
 !if "$(USE_GUI)" == "1"
diff --git a/build/msw/makefile.gcc b/build/msw/makefile.gcc
index ff1cd502d8..f8591201db 100644
--- a/build/msw/makefile.gcc
+++ b/build/msw/makefile.gcc
@@ -521,11 +521,6 @@ BASELIB_OBJECTS =  \
 	$(OBJS)\baselib_main.o \
 	$(OBJS)\baselib_mslu.o \
 	$(OBJS)\baselib_volume.o
-NETDLL_CFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) $(GCCFLAGS) -DHAVE_W32API_H \
-	-D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) \
-	-I..\..\include -I$(SETUPHDIR) -Wall -I..\..\src\tiff -I..\..\src\jpeg \
-	-I..\..\src\png -I..\..\src\zlib -I..\..\src\regex -I..\..\src\expat\lib \
-	-DwxUSE_GUI=0 -DWXUSINGDLL -DWXMAKINGDLL_NET $(CPPFLAGS) $(CFLAGS)
 NETDLL_CXXFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) $(GCCFLAGS) -DHAVE_W32API_H \
 	-D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) \
 	-I..\..\include -I$(SETUPHDIR) -Wall -I..\..\src\tiff -I..\..\src\jpeg \
@@ -546,11 +541,6 @@ NETDLL_OBJECTS =  \
 	$(OBJS)\netdll_url.o \
 	$(OBJS)\netdll_gsocket.o \
 	$(OBJS)\netdll_urlmsw.o
-NETLIB_CFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) $(GCCFLAGS) -DHAVE_W32API_H \
-	-D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) \
-	-I..\..\include -I$(SETUPHDIR) -Wall -I..\..\src\tiff -I..\..\src\jpeg \
-	-I..\..\src\png -I..\..\src\zlib -I..\..\src\regex -I..\..\src\expat\lib \
-	-DwxUSE_GUI=0 $(CPPFLAGS) $(CFLAGS)
 NETLIB_CXXFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) $(GCCFLAGS) -DHAVE_W32API_H \
 	-D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) \
 	-I..\..\include -I$(SETUPHDIR) -Wall -I..\..\src\tiff -I..\..\src\jpeg \
@@ -571,11 +561,6 @@ NETLIB_OBJECTS =  \
 	$(OBJS)\netlib_url.o \
 	$(OBJS)\netlib_gsocket.o \
 	$(OBJS)\netlib_urlmsw.o
-COREDLL_CFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) $(GCCFLAGS) -DHAVE_W32API_H \
-	-D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) \
-	-I..\..\include -I$(SETUPHDIR) -Wall -I..\..\src\tiff -I..\..\src\jpeg \
-	-I..\..\src\png -I..\..\src\zlib -I..\..\src\regex -I..\..\src\expat\lib \
-	-DWXUSINGDLL -DWXMAKINGDLL_CORE -DwxUSE_BASE=0 $(CPPFLAGS) $(CFLAGS)
 COREDLL_CXXFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) $(GCCFLAGS) -DHAVE_W32API_H \
 	-D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) \
 	-I..\..\include -I$(SETUPHDIR) -Wall -I..\..\src\tiff -I..\..\src\jpeg \
@@ -592,11 +577,6 @@ COREDLL_OBJECTS =  \
 	$(OBJS)\coredll_mslu.o \
 	$(OBJS)\coredll_volume.o \
 	$(____CORE_SRC_FILENAMES_2_OBJECTS)
-CORELIB_CFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) $(GCCFLAGS) -DHAVE_W32API_H \
-	-D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) \
-	-I..\..\include -I$(SETUPHDIR) -Wall -I..\..\src\tiff -I..\..\src\jpeg \
-	-I..\..\src\png -I..\..\src\zlib -I..\..\src\regex -I..\..\src\expat\lib \
-	-DwxUSE_BASE=0 $(CPPFLAGS) $(CFLAGS)
 CORELIB_CXXFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) $(GCCFLAGS) -DHAVE_W32API_H \
 	-D__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) \
 	-I..\..\include -I$(SETUPHDIR) -Wall -I..\..\src\tiff -I..\..\src\jpeg \
@@ -3629,8 +3609,8 @@ $(OBJS)\monodll_socket.o: ../../src/common/socket.cpp
 $(OBJS)\monodll_url.o: ../../src/common/url.cpp
 	$(CXX) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
-$(OBJS)\monodll_gsocket.o: ../../src/msw/gsocket.c
-	$(CC) -c -o $@ $(MONODLL_CFLAGS) $<
+$(OBJS)\monodll_gsocket.o: ../../src/msw/gsocket.cpp
+	$(CXX) -c -o $@ $(MONODLL_CXXFLAGS) $<
 
 $(OBJS)\monodll_urlmsw.o: ../../src/msw/urlmsw.cpp
 	$(CXX) -c -o $@ $(MONODLL_CXXFLAGS) $<
@@ -4012,8 +3992,8 @@ $(OBJS)\monodll_gdiobj.o: ../../src/msw/gdiobj.cpp
 endif
 
 ifeq ($(USE_GUI),1)
-$(OBJS)\monodll_gsockmsw.o: ../../src/msw/gsockmsw.c
-	$(CC) -c -o $@ $(MONODLL_CFLAGS) $<
+$(OBJS)\monodll_gsockmsw.o: ../../src/msw/gsockmsw.cpp
+	$(CXX) -c -o $@ $(MONODLL_CXXFLAGS) $<
 endif
 
 ifeq ($(USE_GUI),1)
@@ -5199,8 +5179,8 @@ $(OBJS)\monolib_socket.o: ../../src/common/socket.cpp
 $(OBJS)\monolib_url.o: ../../src/common/url.cpp
 	$(CXX) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
-$(OBJS)\monolib_gsocket.o: ../../src/msw/gsocket.c
-	$(CC) -c -o $@ $(MONOLIB_CFLAGS) $<
+$(OBJS)\monolib_gsocket.o: ../../src/msw/gsocket.cpp
+	$(CXX) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 
 $(OBJS)\monolib_urlmsw.o: ../../src/msw/urlmsw.cpp
 	$(CXX) -c -o $@ $(MONOLIB_CXXFLAGS) $<
@@ -5582,8 +5562,8 @@ $(OBJS)\monolib_gdiobj.o: ../../src/msw/gdiobj.cpp
 endif
 
 ifeq ($(USE_GUI),1)
-$(OBJS)\monolib_gsockmsw.o: ../../src/msw/gsockmsw.c
-	$(CC) -c -o $@ $(MONOLIB_CFLAGS) $<
+$(OBJS)\monolib_gsockmsw.o: ../../src/msw/gsockmsw.cpp
+	$(CXX) -c -o $@ $(MONOLIB_CXXFLAGS) $<
 endif
 
 ifeq ($(USE_GUI),1)
@@ -6985,8 +6965,8 @@ $(OBJS)\netdll_socket.o: ../../src/common/socket.cpp
 $(OBJS)\netdll_url.o: ../../src/common/url.cpp
 	$(CXX) -c -o $@ $(NETDLL_CXXFLAGS) $<
 
-$(OBJS)\netdll_gsocket.o: ../../src/msw/gsocket.c
-	$(CC) -c -o $@ $(NETDLL_CFLAGS) $<
+$(OBJS)\netdll_gsocket.o: ../../src/msw/gsocket.cpp
+	$(CXX) -c -o $@ $(NETDLL_CXXFLAGS) $<
 
 $(OBJS)\netdll_urlmsw.o: ../../src/msw/urlmsw.cpp
 	$(CXX) -c -o $@ $(NETDLL_CXXFLAGS) $<
@@ -7024,8 +7004,8 @@ $(OBJS)\netlib_socket.o: ../../src/common/socket.cpp
 $(OBJS)\netlib_url.o: ../../src/common/url.cpp
 	$(CXX) -c -o $@ $(NETLIB_CXXFLAGS) $<
 
-$(OBJS)\netlib_gsocket.o: ../../src/msw/gsocket.c
-	$(CC) -c -o $@ $(NETLIB_CFLAGS) $<
+$(OBJS)\netlib_gsocket.o: ../../src/msw/gsocket.cpp
+	$(CXX) -c -o $@ $(NETLIB_CXXFLAGS) $<
 
 $(OBJS)\netlib_urlmsw.o: ../../src/msw/urlmsw.cpp
 	$(CXX) -c -o $@ $(NETLIB_CXXFLAGS) $<
@@ -7308,8 +7288,8 @@ $(OBJS)\coredll_gdiobj.o: ../../src/msw/gdiobj.cpp
 endif
 
 ifeq ($(USE_GUI),1)
-$(OBJS)\coredll_gsockmsw.o: ../../src/msw/gsockmsw.c
-	$(CC) -c -o $@ $(COREDLL_CFLAGS) $<
+$(OBJS)\coredll_gsockmsw.o: ../../src/msw/gsockmsw.cpp
+	$(CXX) -c -o $@ $(COREDLL_CXXFLAGS) $<
 endif
 
 ifeq ($(USE_GUI),1)
@@ -8530,8 +8510,8 @@ $(OBJS)\corelib_gdiobj.o: ../../src/msw/gdiobj.cpp
 endif
 
 ifeq ($(USE_GUI),1)
-$(OBJS)\corelib_gsockmsw.o: ../../src/msw/gsockmsw.c
-	$(CC) -c -o $@ $(CORELIB_CFLAGS) $<
+$(OBJS)\corelib_gsockmsw.o: ../../src/msw/gsockmsw.cpp
+	$(CXX) -c -o $@ $(CORELIB_CXXFLAGS) $<
 endif
 
 ifeq ($(USE_GUI),1)
diff --git a/build/msw/makefile.vc b/build/msw/makefile.vc
index 79d0985706..b1f1646ae7 100644
--- a/build/msw/makefile.vc
+++ b/build/msw/makefile.vc
@@ -555,14 +555,6 @@ BASELIB_OBJECTS =  \
 	$(OBJS)\baselib_main.obj \
 	$(OBJS)\baselib_mslu.obj \
 	$(OBJS)\baselib_volume.obj
-NETDLL_CFLAGS = /M$(__RUNTIME_LIBS)$(__DEBUGRUNTIME_126) /DWIN32 \
-	$(__DEBUGINFO) \
-	/Fd$(LIBDIRNAME)\wxbase252$(WXUNICODEFLAG)$(WXDEBUGFLAG)_net_vc$(VENDORTAG).pdb \
-	$(____DEBUGRUNTIME_125_p) $(__OPTIMIZEFLAG) $(__NO_VC_CRTDBG_p) /D__WXMSW__ \
-	$(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) \
-	/I..\..\include /I$(SETUPHDIR) /W4 /I..\..\src\tiff /I..\..\src\jpeg \
-	/I..\..\src\png /I..\..\src\zlib /I..\..\src\regex /I..\..\src\expat\lib \
-	/DwxUSE_GUI=0 /DWXUSINGDLL /DWXMAKINGDLL_NET $(CPPFLAGS) $(CFLAGS)
 NETDLL_CXXFLAGS = /M$(__RUNTIME_LIBS)$(__DEBUGRUNTIME_126) /DWIN32 \
 	$(__DEBUGINFO) \
 	/Fd$(LIBDIRNAME)\wxbase252$(WXUNICODEFLAG)$(WXDEBUGFLAG)_net_vc$(VENDORTAG).pdb \
@@ -587,14 +579,6 @@ NETDLL_OBJECTS =  \
 	$(OBJS)\netdll_url.obj \
 	$(OBJS)\netdll_gsocket.obj \
 	$(OBJS)\netdll_urlmsw.obj
-NETLIB_CFLAGS = /M$(__RUNTIME_LIBS)$(__DEBUGRUNTIME_138) /DWIN32 \
-	$(__DEBUGINFO) \
-	/Fd$(LIBDIRNAME)\wxbase25$(WXUNICODEFLAG)$(WXDEBUGFLAG)_net.pdb \
-	$(____DEBUGRUNTIME_137_p) $(__OPTIMIZEFLAG) $(__NO_VC_CRTDBG_p) /D__WXMSW__ \
-	$(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) \
-	/I..\..\include /I$(SETUPHDIR) /W4 /I..\..\src\tiff /I..\..\src\jpeg \
-	/I..\..\src\png /I..\..\src\zlib /I..\..\src\regex /I..\..\src\expat\lib \
-	/DwxUSE_GUI=0 $(CPPFLAGS) $(CFLAGS)
 NETLIB_CXXFLAGS = /M$(__RUNTIME_LIBS)$(__DEBUGRUNTIME_138) /DWIN32 \
 	$(__DEBUGINFO) \
 	/Fd$(LIBDIRNAME)\wxbase25$(WXUNICODEFLAG)$(WXDEBUGFLAG)_net.pdb \
@@ -618,14 +602,6 @@ NETLIB_OBJECTS =  \
 	$(OBJS)\netlib_url.obj \
 	$(OBJS)\netlib_gsocket.obj \
 	$(OBJS)\netlib_urlmsw.obj
-COREDLL_CFLAGS = /M$(__RUNTIME_LIBS)$(__DEBUGRUNTIME_151) /DWIN32 \
-	$(__DEBUGINFO) \
-	/Fd$(LIBDIRNAME)\wx$(PORTNAME)$(WXUNIVNAME)252$(WXUNICODEFLAG)$(WXDEBUGFLAG)_core_vc$(VENDORTAG).pdb \
-	$(____DEBUGRUNTIME_150_p) $(__OPTIMIZEFLAG) $(__NO_VC_CRTDBG_p) /D__WXMSW__ \
-	$(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) \
-	/I..\..\include /I$(SETUPHDIR) /W4 /I..\..\src\tiff /I..\..\src\jpeg \
-	/I..\..\src\png /I..\..\src\zlib /I..\..\src\regex /I..\..\src\expat\lib \
-	/DWXUSINGDLL /DWXMAKINGDLL_CORE /DwxUSE_BASE=0 $(CPPFLAGS) $(CFLAGS)
 COREDLL_CXXFLAGS = /M$(__RUNTIME_LIBS)$(__DEBUGRUNTIME_151) /DWIN32 \
 	$(__DEBUGINFO) \
 	/Fd$(LIBDIRNAME)\wx$(PORTNAME)$(WXUNIVNAME)252$(WXUNICODEFLAG)$(WXDEBUGFLAG)_core_vc$(VENDORTAG).pdb \
@@ -646,14 +622,6 @@ COREDLL_OBJECTS =  \
 	$(OBJS)\coredll_mslu.obj \
 	$(OBJS)\coredll_volume.obj \
 	$(____CORE_SRC_FILENAMES_2_OBJECTS)
-CORELIB_CFLAGS = /M$(__RUNTIME_LIBS)$(__DEBUGRUNTIME_163) /DWIN32 \
-	$(__DEBUGINFO) \
-	/Fd$(LIBDIRNAME)\wx$(PORTNAME)$(WXUNIVNAME)25$(WXUNICODEFLAG)$(WXDEBUGFLAG)_core.pdb \
-	$(____DEBUGRUNTIME_162_p) $(__OPTIMIZEFLAG) $(__NO_VC_CRTDBG_p) /D__WXMSW__ \
-	$(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) \
-	/I..\..\include /I$(SETUPHDIR) /W4 /I..\..\src\tiff /I..\..\src\jpeg \
-	/I..\..\src\png /I..\..\src\zlib /I..\..\src\regex /I..\..\src\expat\lib \
-	/DwxUSE_BASE=0 $(CPPFLAGS) $(CFLAGS)
 CORELIB_CXXFLAGS = /M$(__RUNTIME_LIBS)$(__DEBUGRUNTIME_163) /DWIN32 \
 	$(__DEBUGINFO) \
 	/Fd$(LIBDIRNAME)\wx$(PORTNAME)$(WXUNIVNAME)25$(WXUNICODEFLAG)$(WXDEBUGFLAG)_core.pdb \
@@ -4144,8 +4112,8 @@ $(OBJS)\monodll_socket.obj: ..\..\src\common\socket.cpp
 $(OBJS)\monodll_url.obj: ..\..\src\common\url.cpp
 	$(CXX) /c /nologo /TP /Fo$@ $(MONODLL_CXXFLAGS) $**
 
-$(OBJS)\monodll_gsocket.obj: ..\..\src\msw\gsocket.c
-	$(CC) /c /nologo /TC /Fo$@ $(MONODLL_CFLAGS) $**
+$(OBJS)\monodll_gsocket.obj: ..\..\src\msw\gsocket.cpp
+	$(CXX) /c /nologo /TP /Fo$@ $(MONODLL_CXXFLAGS) $**
 
 $(OBJS)\monodll_urlmsw.obj: ..\..\src\msw\urlmsw.cpp
 	$(CXX) /c /nologo /TP /Fo$@ $(MONODLL_CXXFLAGS) $**
@@ -4527,8 +4495,8 @@ $(OBJS)\monodll_gdiobj.obj: ..\..\src\msw\gdiobj.cpp
 !endif
 
 !if "$(USE_GUI)" == "1"
-$(OBJS)\monodll_gsockmsw.obj: ..\..\src\msw\gsockmsw.c
-	$(CC) /c /nologo /TC /Fo$@ $(MONODLL_CFLAGS) $**
+$(OBJS)\monodll_gsockmsw.obj: ..\..\src\msw\gsockmsw.cpp
+	$(CXX) /c /nologo /TP /Fo$@ $(MONODLL_CXXFLAGS) $**
 !endif
 
 !if "$(USE_GUI)" == "1"
@@ -5614,8 +5582,8 @@ $(OBJS)\monolib_socket.obj: ..\..\src\common\socket.cpp
 $(OBJS)\monolib_url.obj: ..\..\src\common\url.cpp
 	$(CXX) /c /nologo /TP /Fo$@ $(MONOLIB_CXXFLAGS) $**
 
-$(OBJS)\monolib_gsocket.obj: ..\..\src\msw\gsocket.c
-	$(CC) /c /nologo /TC /Fo$@ $(MONOLIB_CFLAGS) $**
+$(OBJS)\monolib_gsocket.obj: ..\..\src\msw\gsocket.cpp
+	$(CXX) /c /nologo /TP /Fo$@ $(MONOLIB_CXXFLAGS) $**
 
 $(OBJS)\monolib_urlmsw.obj: ..\..\src\msw\urlmsw.cpp
 	$(CXX) /c /nologo /TP /Fo$@ $(MONOLIB_CXXFLAGS) $**
@@ -5997,8 +5965,8 @@ $(OBJS)\monolib_gdiobj.obj: ..\..\src\msw\gdiobj.cpp
 !endif
 
 !if "$(USE_GUI)" == "1"
-$(OBJS)\monolib_gsockmsw.obj: ..\..\src\msw\gsockmsw.c
-	$(CC) /c /nologo /TC /Fo$@ $(MONOLIB_CFLAGS) $**
+$(OBJS)\monolib_gsockmsw.obj: ..\..\src\msw\gsockmsw.cpp
+	$(CXX) /c /nologo /TP /Fo$@ $(MONOLIB_CXXFLAGS) $**
 !endif
 
 !if "$(USE_GUI)" == "1"
@@ -7300,8 +7268,8 @@ $(OBJS)\netdll_socket.obj: ..\..\src\common\socket.cpp
 $(OBJS)\netdll_url.obj: ..\..\src\common\url.cpp
 	$(CXX) /c /nologo /TP /Fo$@ $(NETDLL_CXXFLAGS) $**
 
-$(OBJS)\netdll_gsocket.obj: ..\..\src\msw\gsocket.c
-	$(CC) /c /nologo /TC /Fo$@ $(NETDLL_CFLAGS) $**
+$(OBJS)\netdll_gsocket.obj: ..\..\src\msw\gsocket.cpp
+	$(CXX) /c /nologo /TP /Fo$@ $(NETDLL_CXXFLAGS) $**
 
 $(OBJS)\netdll_urlmsw.obj: ..\..\src\msw\urlmsw.cpp
 	$(CXX) /c /nologo /TP /Fo$@ $(NETDLL_CXXFLAGS) $**
@@ -7339,8 +7307,8 @@ $(OBJS)\netlib_socket.obj: ..\..\src\common\socket.cpp
 $(OBJS)\netlib_url.obj: ..\..\src\common\url.cpp
 	$(CXX) /c /nologo /TP /Fo$@ $(NETLIB_CXXFLAGS) $**
 
-$(OBJS)\netlib_gsocket.obj: ..\..\src\msw\gsocket.c
-	$(CC) /c /nologo /TC /Fo$@ $(NETLIB_CFLAGS) $**
+$(OBJS)\netlib_gsocket.obj: ..\..\src\msw\gsocket.cpp
+	$(CXX) /c /nologo /TP /Fo$@ $(NETLIB_CXXFLAGS) $**
 
 $(OBJS)\netlib_urlmsw.obj: ..\..\src\msw\urlmsw.cpp
 	$(CXX) /c /nologo /TP /Fo$@ $(NETLIB_CXXFLAGS) $**
@@ -7623,8 +7591,8 @@ $(OBJS)\coredll_gdiobj.obj: ..\..\src\msw\gdiobj.cpp
 !endif
 
 !if "$(USE_GUI)" == "1"
-$(OBJS)\coredll_gsockmsw.obj: ..\..\src\msw\gsockmsw.c
-	$(CC) /c /nologo /TC /Fo$@ $(COREDLL_CFLAGS) $**
+$(OBJS)\coredll_gsockmsw.obj: ..\..\src\msw\gsockmsw.cpp
+	$(CXX) /c /nologo /TP /Fo$@ $(COREDLL_CXXFLAGS) $**
 !endif
 
 !if "$(USE_GUI)" == "1"
@@ -8745,8 +8713,8 @@ $(OBJS)\corelib_gdiobj.obj: ..\..\src\msw\gdiobj.cpp
 !endif
 
 !if "$(USE_GUI)" == "1"
-$(OBJS)\corelib_gsockmsw.obj: ..\..\src\msw\gsockmsw.c
-	$(CC) /c /nologo /TC /Fo$@ $(CORELIB_CFLAGS) $**
+$(OBJS)\corelib_gsockmsw.obj: ..\..\src\msw\gsockmsw.cpp
+	$(CXX) /c /nologo /TP /Fo$@ $(CORELIB_CXXFLAGS) $**
 !endif
 
 !if "$(USE_GUI)" == "1"
diff --git a/build/msw/makefile.wat b/build/msw/makefile.wat
index 6e96922b02..2be53976b6 100644
--- a/build/msw/makefile.wat
+++ b/build/msw/makefile.wat
@@ -2525,12 +2525,6 @@ BASELIB_OBJECTS =  &
 	$(OBJS)\baselib_main.obj &
 	$(OBJS)\baselib_mslu.obj &
 	$(OBJS)\baselib_volume.obj
-NETDLL_CFLAGS = -bd $(__DEBUGINFO) $(__OPTIMIZEFLAG) -bm $(__RUNTIME_LIBS) &
-	-d__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) &
-	-i=..\..\include -i=$(SETUPHDIR) -i=..\..\src\tiff -i=..\..\src\jpeg &
-	-i=..\..\src\png -i=..\..\src\zlib -i=..\..\src\regex &
-	-i=..\..\src\expat\lib -dwxUSE_GUI=0 -dWXUSINGDLL -dWXMAKINGDLL_NET &
-	$(CPPFLAGS) $(CFLAGS)
 NETDLL_CXXFLAGS = -bd $(__DEBUGINFO) $(__OPTIMIZEFLAG) -bm $(__RUNTIME_LIBS) &
 	-d__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) &
 	-i=..\..\include -i=$(SETUPHDIR) -i=..\..\src\tiff -i=..\..\src\jpeg &
@@ -2551,11 +2545,6 @@ NETDLL_OBJECTS =  &
 	$(OBJS)\netdll_url.obj &
 	$(OBJS)\netdll_gsocket.obj &
 	$(OBJS)\netdll_urlmsw.obj
-NETLIB_CFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) -bm $(__RUNTIME_LIBS) &
-	-d__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) &
-	-i=..\..\include -i=$(SETUPHDIR) -i=..\..\src\tiff -i=..\..\src\jpeg &
-	-i=..\..\src\png -i=..\..\src\zlib -i=..\..\src\regex &
-	-i=..\..\src\expat\lib -dwxUSE_GUI=0 $(CPPFLAGS) $(CFLAGS)
 NETLIB_CXXFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) -bm $(__RUNTIME_LIBS) &
 	-d__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) &
 	-i=..\..\include -i=$(SETUPHDIR) -i=..\..\src\tiff -i=..\..\src\jpeg &
@@ -2576,12 +2565,6 @@ NETLIB_OBJECTS =  &
 	$(OBJS)\netlib_url.obj &
 	$(OBJS)\netlib_gsocket.obj &
 	$(OBJS)\netlib_urlmsw.obj
-COREDLL_CFLAGS = -bd $(__DEBUGINFO) $(__OPTIMIZEFLAG) -bm $(__RUNTIME_LIBS) &
-	-d__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) &
-	-i=..\..\include -i=$(SETUPHDIR) -i=..\..\src\tiff -i=..\..\src\jpeg &
-	-i=..\..\src\png -i=..\..\src\zlib -i=..\..\src\regex &
-	-i=..\..\src\expat\lib -dWXUSINGDLL -dWXMAKINGDLL_CORE -dwxUSE_BASE=0 &
-	$(CPPFLAGS) $(CFLAGS)
 COREDLL_CXXFLAGS = -bd $(__DEBUGINFO) $(__OPTIMIZEFLAG) -bm $(__RUNTIME_LIBS) &
 	-d__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) &
 	-i=..\..\include -i=$(SETUPHDIR) -i=..\..\src\tiff -i=..\..\src\jpeg &
@@ -2598,11 +2581,6 @@ COREDLL_OBJECTS =  &
 	$(OBJS)\coredll_mslu.obj &
 	$(OBJS)\coredll_volume.obj &
 	$(____CORE_SRC_FILENAMES_2_OBJECTS)
-CORELIB_CFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) -bm $(__RUNTIME_LIBS) &
-	-d__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) &
-	-i=..\..\include -i=$(SETUPHDIR) -i=..\..\src\tiff -i=..\..\src\jpeg &
-	-i=..\..\src\png -i=..\..\src\zlib -i=..\..\src\regex &
-	-i=..\..\src\expat\lib -dwxUSE_BASE=0 $(CPPFLAGS) $(CFLAGS)
 CORELIB_CXXFLAGS = $(__DEBUGINFO) $(__OPTIMIZEFLAG) -bm $(__RUNTIME_LIBS) &
 	-d__WXMSW__ $(__WXUNIV_DEFINE_p) $(__DEBUG_DEFINE_p) $(__UNICODE_DEFINE_p) &
 	-i=..\..\include -i=$(SETUPHDIR) -i=..\..\src\tiff -i=..\..\src\jpeg &
@@ -3819,8 +3797,8 @@ $(OBJS)\monodll_socket.obj :  .AUTODEPEND ..\..\src\common\socket.cpp
 $(OBJS)\monodll_url.obj :  .AUTODEPEND ..\..\src\common\url.cpp
 	$(CXX) -zq -fo=$^@ $(MONODLL_CXXFLAGS) $<
 
-$(OBJS)\monodll_gsocket.obj :  .AUTODEPEND ..\..\src\msw\gsocket.c
-	$(CC) -zq -fo=$^@ $(MONODLL_CFLAGS) $<
+$(OBJS)\monodll_gsocket.obj :  .AUTODEPEND ..\..\src\msw\gsocket.cpp
+	$(CXX) -zq -fo=$^@ $(MONODLL_CXXFLAGS) $<
 
 $(OBJS)\monodll_urlmsw.obj :  .AUTODEPEND ..\..\src\msw\urlmsw.cpp
 	$(CXX) -zq -fo=$^@ $(MONODLL_CXXFLAGS) $<
@@ -4202,8 +4180,8 @@ $(OBJS)\monodll_gdiobj.obj :  .AUTODEPEND ..\..\src\msw\gdiobj.cpp
 !endif
 
 !ifeq USE_GUI 1
-$(OBJS)\monodll_gsockmsw.obj :  .AUTODEPEND ..\..\src\msw\gsockmsw.c
-	$(CC) -zq -fo=$^@ $(MONODLL_CFLAGS) $<
+$(OBJS)\monodll_gsockmsw.obj :  .AUTODEPEND ..\..\src\msw\gsockmsw.cpp
+	$(CXX) -zq -fo=$^@ $(MONODLL_CXXFLAGS) $<
 !endif
 
 !ifeq USE_GUI 1
@@ -5389,8 +5367,8 @@ $(OBJS)\monolib_socket.obj :  .AUTODEPEND ..\..\src\common\socket.cpp
 $(OBJS)\monolib_url.obj :  .AUTODEPEND ..\..\src\common\url.cpp
 	$(CXX) -zq -fo=$^@ $(MONOLIB_CXXFLAGS) $<
 
-$(OBJS)\monolib_gsocket.obj :  .AUTODEPEND ..\..\src\msw\gsocket.c
-	$(CC) -zq -fo=$^@ $(MONOLIB_CFLAGS) $<
+$(OBJS)\monolib_gsocket.obj :  .AUTODEPEND ..\..\src\msw\gsocket.cpp
+	$(CXX) -zq -fo=$^@ $(MONOLIB_CXXFLAGS) $<
 
 $(OBJS)\monolib_urlmsw.obj :  .AUTODEPEND ..\..\src\msw\urlmsw.cpp
 	$(CXX) -zq -fo=$^@ $(MONOLIB_CXXFLAGS) $<
@@ -5772,8 +5750,8 @@ $(OBJS)\monolib_gdiobj.obj :  .AUTODEPEND ..\..\src\msw\gdiobj.cpp
 !endif
 
 !ifeq USE_GUI 1
-$(OBJS)\monolib_gsockmsw.obj :  .AUTODEPEND ..\..\src\msw\gsockmsw.c
-	$(CC) -zq -fo=$^@ $(MONOLIB_CFLAGS) $<
+$(OBJS)\monolib_gsockmsw.obj :  .AUTODEPEND ..\..\src\msw\gsockmsw.cpp
+	$(CXX) -zq -fo=$^@ $(MONOLIB_CXXFLAGS) $<
 !endif
 
 !ifeq USE_GUI 1
@@ -7175,8 +7153,8 @@ $(OBJS)\netdll_socket.obj :  .AUTODEPEND ..\..\src\common\socket.cpp
 $(OBJS)\netdll_url.obj :  .AUTODEPEND ..\..\src\common\url.cpp
 	$(CXX) -zq -fo=$^@ $(NETDLL_CXXFLAGS) $<
 
-$(OBJS)\netdll_gsocket.obj :  .AUTODEPEND ..\..\src\msw\gsocket.c
-	$(CC) -zq -fo=$^@ $(NETDLL_CFLAGS) $<
+$(OBJS)\netdll_gsocket.obj :  .AUTODEPEND ..\..\src\msw\gsocket.cpp
+	$(CXX) -zq -fo=$^@ $(NETDLL_CXXFLAGS) $<
 
 $(OBJS)\netdll_urlmsw.obj :  .AUTODEPEND ..\..\src\msw\urlmsw.cpp
 	$(CXX) -zq -fo=$^@ $(NETDLL_CXXFLAGS) $<
@@ -7214,8 +7192,8 @@ $(OBJS)\netlib_socket.obj :  .AUTODEPEND ..\..\src\common\socket.cpp
 $(OBJS)\netlib_url.obj :  .AUTODEPEND ..\..\src\common\url.cpp
 	$(CXX) -zq -fo=$^@ $(NETLIB_CXXFLAGS) $<
 
-$(OBJS)\netlib_gsocket.obj :  .AUTODEPEND ..\..\src\msw\gsocket.c
-	$(CC) -zq -fo=$^@ $(NETLIB_CFLAGS) $<
+$(OBJS)\netlib_gsocket.obj :  .AUTODEPEND ..\..\src\msw\gsocket.cpp
+	$(CXX) -zq -fo=$^@ $(NETLIB_CXXFLAGS) $<
 
 $(OBJS)\netlib_urlmsw.obj :  .AUTODEPEND ..\..\src\msw\urlmsw.cpp
 	$(CXX) -zq -fo=$^@ $(NETLIB_CXXFLAGS) $<
@@ -7498,8 +7476,8 @@ $(OBJS)\coredll_gdiobj.obj :  .AUTODEPEND ..\..\src\msw\gdiobj.cpp
 !endif
 
 !ifeq USE_GUI 1
-$(OBJS)\coredll_gsockmsw.obj :  .AUTODEPEND ..\..\src\msw\gsockmsw.c
-	$(CC) -zq -fo=$^@ $(COREDLL_CFLAGS) $<
+$(OBJS)\coredll_gsockmsw.obj :  .AUTODEPEND ..\..\src\msw\gsockmsw.cpp
+	$(CXX) -zq -fo=$^@ $(COREDLL_CXXFLAGS) $<
 !endif
 
 !ifeq USE_GUI 1
@@ -8720,8 +8698,8 @@ $(OBJS)\corelib_gdiobj.obj :  .AUTODEPEND ..\..\src\msw\gdiobj.cpp
 !endif
 
 !ifeq USE_GUI 1
-$(OBJS)\corelib_gsockmsw.obj :  .AUTODEPEND ..\..\src\msw\gsockmsw.c
-	$(CC) -zq -fo=$^@ $(CORELIB_CFLAGS) $<
+$(OBJS)\corelib_gsockmsw.obj :  .AUTODEPEND ..\..\src\msw\gsockmsw.cpp
+	$(CXX) -zq -fo=$^@ $(CORELIB_CXXFLAGS) $<
 !endif
 
 !ifeq USE_GUI 1
diff --git a/build/msw/wx_core.dsp b/build/msw/wx_core.dsp
index ddf93b1367..26dbbee794 100644
--- a/build/msw/wx_core.dsp
+++ b/build/msw/wx_core.dsp
@@ -1953,8 +1953,7 @@ SOURCE=..\..\src\msw\gdiobj.cpp
 # End Source File
 # Begin Source File
 
-SOURCE=..\..\src\msw\gsockmsw.c
-# SUBTRACT CPP /YX /Yc /Yu
+SOURCE=..\..\src\msw\gsockmsw.cpp
 # End Source File
 # Begin Source File
 
diff --git a/build/msw/wx_net.dsp b/build/msw/wx_net.dsp
index aee8c3f8fa..a4f77a13be 100644
--- a/build/msw/wx_net.dsp
+++ b/build/msw/wx_net.dsp
@@ -502,8 +502,7 @@ SOURCE=..\..\src\msw\dummy.cpp
 # End Source File
 # Begin Source File
 
-SOURCE=..\..\src\msw\gsocket.c
-# SUBTRACT CPP /YX /Yc /Yu
+SOURCE=..\..\src\msw\gsocket.cpp
 # End Source File
 # Begin Source File
 
diff --git a/include/wx/gsocket.h b/include/wx/gsocket.h
index e466deed27..8ccedd46da 100644
--- a/include/wx/gsocket.h
+++ b/include/wx/gsocket.h
@@ -11,10 +11,13 @@
 #ifndef __GSOCKET_H
 #define __GSOCKET_H
 
-/* DFE: Define this and compile gsocket.cpp instead of gsocket.c and
-   compile existing GUI gsock*.c as C++ to try out the new GSocket. */
-/* #define wxUSE_GSOCKET_CPLUSPLUS 1 */
+// FIXME: OS/2 needs to move to modern C++ GSocket
+#if defined(__OS2__)
 #undef wxUSE_GSOCKET_CPLUSPLUS
+#else
+#define wxUSE_GSOCKET_CPLUSPLUS 1
+#endif
+
 #if !defined(__cplusplus) && defined(wxUSE_GSOCKET_CPLUSPLUS)
 #error "You need to compile this file (probably a GUI gsock peice) as C++"
 #endif
diff --git a/src/wxWindows.dsp b/src/wxWindows.dsp
index e96d2621a1..ae50411cfb 100644
--- a/src/wxWindows.dsp
+++ b/src/wxWindows.dsp
@@ -1288,13 +1288,11 @@ SOURCE=.\msw\glcanvas.cpp
 # End Source File
 # Begin Source File
 
-SOURCE=.\msw\gsocket.c
-# SUBTRACT CPP /YX /Yc /Yu
+SOURCE=.\msw\gsocket.cpp
 # End Source File
 # Begin Source File
 
-SOURCE=.\msw\gsockmsw.c
-# SUBTRACT CPP /YX /Yc /Yu
+SOURCE=.\msw\gsockmsw.cpp
 # End Source File
 # Begin Source File