-void wxWindowOS2::GetTextExtent( const wxString& rString,
-                                 int* pX,
-                                 int* pY,
-                                 int* pDescent,
-                                 int* pExternalLeading,
-                                 const wxFont* WXUNUSED(pTheFont) ) const
+void wxWindowOS2::DoGetTextExtent( const wxString& rString,
+                                   int* pX,
+                                   int* pY,
+                                   int* pDescent,
+                                   int* pExternalLeading,
+                                   const wxFont* WXUNUSED(pTheFont) ) const