#ifndef WX_PRECOMP
     #include "wx/string.h"
+    #include "wx/app.h"
 #endif // WX_PRECOMP
 
 #include "wx/os2/private.h"
-#include "wx/app.h"
 #include "wx/os2/gdiimage.h"
 
 #include "wx/listimpl.cpp"
 
     // creating and saving icons is not supported
     virtual bool Create( wxGDIImage* WXUNUSED(pImage)
-                        ,void*       WXUNUSED(pData)
+                        ,const void* WXUNUSED(pData)
                         ,long        WXUNUSED(lFlags)
                         ,int         WXUNUSED(nWidth)
                         ,int         WXUNUSED(nHeight)
     return true;
 }
 
-WXHANDLE wxGDIImage::GetResourceHandle()
+WXHANDLE wxGDIImage::GetResourceHandle() const
 {
     return GetHandle();
 }
     {
         wxGDIImageHandler*          pHandler = pNode->GetData();
 
-        if ( (pHandler->GetExtension() = rExtension) &&
+        if ( (pHandler->GetExtension() == rExtension) &&
              (lType == -1 || pHandler->GetType() == lType) )
         {
             return pHandler;
 {
     HPOINTER                        hIcon;
 
-    hIcon = ::WinLoadFileIcon( (PSZ)rName.c_str()
+    hIcon = ::WinLoadFileIcon( rName.c_str()
                               ,TRUE // load for private use
                              );