Added CS_OWNDC fix to wxGLCanvas and corrected sample makefiles

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4240 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

utils/glcanvas/win/glcanvas.h

@@ -79,6 +79,10 @@ class wxGLCanvas: public wxScrolledWindow
 
    ~wxGLCanvas();
 
+   // Replaces wxWindow::Create functionality, since we need to use a different window class
+   bool Create(wxWindow *parent, wxWindowID id,
+              const wxPoint& pos, const wxSize& size, long style, const wxString& name);
+
    void SetCurrent();
    void SetColour(const char *colour);
    void SwapBuffers();