report more information about the control whose creation failed in the assert

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31511 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/control.cpp

@@ -154,8 +154,13 @@ bool wxControl::MSWCreateControl(const wxChar *classname,
 
     if ( !m_hWnd )
     {
-        wxLogDebug(wxT("Failed to create a control of class '%s'"), classname);
+#ifdef __WXDEBUG__
-        wxFAIL_MSG(_T("something is very wrong, CreateWindowEx failed"));
+        wxFAIL_MSG(wxString::Format
+                   (
+                    _T("CreateWindowEx(\"%s\", flags=%08x, ex=%08x) failed"),
+                    classname, style, exstyle
+                   ));
+#endif // __WXDEBUG__
 
         return false;
     }