// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
-#pragma implementation "msgdlg.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
-#ifndef WX_PRECOMP
-#include <stdio.h>
-#include "wx/defs.h"
-#include "wx/utils.h"
-#include "wx/dialog.h"
-#include "wx/app.h"
 #include "wx/msgdlg.h"
-#include "wx/math.h"
+
+#ifndef WX_PRECOMP
+    #include <stdio.h>
+    #include "wx/utils.h"
+    #include "wx/dialog.h"
+    #include "wx/app.h"
+    #include "wx/math.h"
 #endif
 
 #include "wx/os2/private.h"
 
     ULONG                           ulAns = ::WinMessageBox( hWnd
                                                             ,hWnd
-                                                            ,(PSZ)m_sMessage.c_str()
-                                                            ,(PSZ)m_sCaption.c_str()
+                                                            ,m_sMessage.c_str()
+                                                            ,m_sCaption.c_str()
                                                             ,0L
                                                             ,ulStyle);
     switch (ulAns)