diff --git a/samples/dynamic/minimal.cpp b/samples/dynamic/minimal.cpp
deleted file mode 100644
index 354d3aaec4..0000000000
--- a/samples/dynamic/minimal.cpp
+++ /dev/null
@@ -1,113 +0,0 @@
-/////////////////////////////////////////////////////////////////////////////
-// Name:        minimal.cpp
-// Purpose:     Dynamic events wxWindows sample
-// Author:      Julian Smart
-// Modified by:
-// Created:     04/01/98
-// RCS-ID:      $Id$
-// Copyright:   (c) Julian Smart and Markus Holzem
-// Licence:   	wxWindows license
-/////////////////////////////////////////////////////////////////////////////
-
-#ifdef __GNUG__
-#pragma implementation "minimal.cpp"
-#pragma interface "minimal.cpp"
-#endif
-
-// For compilers that support precompilation, includes "wx/wx.h".
-#include "wx/wxprec.h"
-
-#ifdef __BORLANDC__
-#pragma hdrstop
-#endif
-
-#ifndef WX_PRECOMP
-#include "wx/wx.h"
-#endif
-
-#ifdef __WXGTK__
-#include "mondrian.xpm"
-#endif
-
-// Define a new application type
-class MyApp: public wxApp
-{ public:
-    bool OnInit(void);
-};
-
-// Define a new frame type
-class MyFrame: public wxFrame
-{ public:
-    MyFrame(wxFrame *frame, char *title, int x, int y, int w, int h);
-    
- public:
-    void OnQuit(wxCommandEvent& event);
-    void OnAbout(wxCommandEvent& event);
-	bool OnClose(void) { return TRUE; }
-};
-
-// ID for the menu commands
-#define MINIMAL_QUIT 	1
-#define MINIMAL_TEXT 	101
-#define MINIMAL_ABOUT 	102
-
-// Create a new application object
-IMPLEMENT_APP	(MyApp)
-
-// `Main program' equivalent, creating windows and returning main app frame
-bool MyApp::OnInit(void)
-{
-  // Create the main frame window
-  MyFrame *frame = new MyFrame((wxFrame *) NULL, (char *) "Minimal wxWindows App", 50, 50, 450, 340);
-  
-  frame->Connect( MINIMAL_QUIT,  -1, wxEVT_COMMAND_MENU_SELECTED, (wxObjectEventFunction)MyFrame::OnQuit );
-  frame->Connect( MINIMAL_ABOUT, -1, wxEVT_COMMAND_MENU_SELECTED, (wxObjectEventFunction)MyFrame::OnAbout );
-  
-  // Give it an icon
-#ifdef __WXMSW__
-  frame->SetIcon(wxIcon("mondrian"));
-#else
-  frame->SetIcon(wxIcon(mondrian_xpm));
-#endif
-
-  // Make a menubar
-  wxMenu *file_menu = new wxMenu;
-
-  file_menu->Append(MINIMAL_ABOUT, "&About");
-  file_menu->Append(MINIMAL_QUIT, "E&xit");
-  wxMenuBar *menu_bar = new wxMenuBar;
-  menu_bar->Append(file_menu, "&File");
-  frame->SetMenuBar(menu_bar);
-
-  // Make a panel with a message
-  wxPanel *panel = new wxPanel(frame, -1, wxPoint(0, 0), wxSize(400, 200), wxTAB_TRAVERSAL);
-
-  (void)new wxStaticText(panel, 311, "Hello!", wxPoint(10, 10), wxSize(-1, -1), 0);
-
-  // Show the frame
-  frame->Show(TRUE);
-  
-  SetTopWindow(frame);
-
-  return TRUE;
-}
-
-// My frame constructor
-MyFrame::MyFrame(wxFrame *frame, char *title, int x, int y, int w, int h):
-  wxFrame(frame, -1, title, wxPoint(x, y), wxSize(w, h))
-{}
-
-void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event) )
-{
-  Close(TRUE);
-}
-
-void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event) )
-{
-  wxMessageDialog dialog(this, "This is a minimal sample\nA second line in the message box",
-  	"About Minimal", wxYES_NO|wxCANCEL);
-
-  dialog.ShowModal();
-}
-
-
diff --git a/src/png/makefile.nt b/src/png/makefile.nt
deleted file mode 100644
index ab823c8fc9..0000000000
--- a/src/png/makefile.nt
+++ /dev/null
@@ -1,68 +0,0 @@
-#
-# File:		makefile.nt
-# Author:	Julian Smart
-# Created:	1993
-# Updated:	
-# Copyright:	(c) 1993, AIAI, University of Edinburgh
-#
-# "%W% %G%"
-#
-# Makefile : Builds winpng.lib library for Windows 3.1
-
-# Change WXDIR or WXWIN to wherever wxWindows is found
-WXDIR = $(WXWIN)
-WXLIB = $(WXDIR)\lib\wx.lib
-WXINC = $(WXDIR)\include
-
-WINPNGDIR = ..\png
-WINPNGINC = $(WINPNGDIR)
-WINPNGLIB = ..\..\lib\winpng.lib
-
-INC = /I..\zlib
-
-FINAL=1
-
-# Set this to nothing if your compiler is MS C++ 7
-ZOPTION=
-
-!ifndef FINAL
-FINAL=0
-!endif
-
-PRECOMP=/YuWX.H 
-
-!if "$(FINAL)" == "0"
-OPT = /Od
-CPPFLAGS= /W4 /Zi /MD /GX- $(ZOPTION) $(OPT) /Dwx_msw $(INC) # $(PRECOMP) /Fp$(WXDIR)\src\msw\wx.pch
-CFLAGS= /W4 /Zi /MD /GX- /Od /Dwx_msw $(INC)
-LINKFLAGS=/NOD /CO /ONERROR:NOEXE
-!else
-# /Ox for real FINAL version
-OPT = /O2
-CPPFLAGS= /W4 /MD /GX- /Dwx_msw $(INC) # $(PRECOMP) /Fp$(WXDIR)\src\msw\wx.pch
-CFLAGS= /W4 /MD /GX- /Dwx_msw $(INC)
-LINKFLAGS=/NOD /ONERROR:NOEXE
-!endif
-
-OBJECTS = png.obj pngread.obj pngrtran.obj pngrutil.obj \
- pngpread.obj pngtrans.obj pngwrite.obj pngwtran.obj pngwutil.obj \
- pngerror.obj pngmem.obj pngwio.obj pngrio.obj pngget.obj pngset.obj
-
-all:    $(WINPNGLIB)
-
-$(WINPNGLIB):      $(OBJECTS)
-        erase $(WINPNGLIB)
-        lib @<<
--out:$(WINPNGLIB)
-$(OBJECTS)
-<<
-
-.c.obj:
-  cl -DWIN32 $(OPT) $(CFLAGS) /c $*.c
-
-clean:
-        erase *.obj
-        erase *.exe
-        erase *.lib
-
-cleanall:	clean