Register message "TaskbarButtonCreated" when wxTopLevelWindowMSW is created.

This message is used to make sure the taskbar button is in place, so
wxTaskbarButton object can initialize correctly.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77590 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/toplevel.cpp

@@ -63,6 +63,18 @@
     #define ICON_SMALL 0
 #endif
 
+// ----------------------------------------------------------------------------
+// globals
+// ----------------------------------------------------------------------------
+
+#if wxUSE_MENUS || wxUSE_MENUS_NATIVE
+    extern wxMenu *wxCurrentPopupMenu;
+#endif // wxUSE_MENUS || wxUSE_MENUS_NATIVE
+
+#if wxUSE_TASKBARBUTTON
+static WXUINT gs_msgTaskbarButtonCreated = 0;
+#endif
+
 // ----------------------------------------------------------------------------
 // stubs for missing functions under MicroWindows
 // ----------------------------------------------------------------------------
@@ -415,6 +427,12 @@ WXLRESULT wxTopLevelWindowMSW::MSWWindowProc(WXUINT message, WXWPARAM wParam, WX
             }
             break;
     }
+#if wxUSE_TASKBARBUTTON
+    if ( message == gs_msgTaskbarButtonCreated )
+    {
+        processed = true;
+    }
+#endif
 
     if ( !processed )
         rc = wxTopLevelWindowBase::MSWWindowProc(message, wParam, lParam);
@@ -631,6 +649,10 @@ bool wxTopLevelWindowMSW::Create(wxWindow *parent,
 #if defined(__SMARTPHONE__) && defined(__WXWINCE__)
     SetRightMenu(); // to nothing for initialization
 #endif
+#if wxUSE_TASKBARBUTTON
+    gs_msgTaskbarButtonCreated =
+        ::RegisterWindowMessage(wxT("TaskbarButtonCreated"));
+#endif
 
     return ret;
 }