Hello, I have a function that will receive a Handle. That handle could be a pointer to a structure, or a object. Is there any safe way to discover it's nature?
The following code will work when the Handle is an Object or nil, but will crash the application when the Handle is a structure: function TQtWidgetSet.IsValidGDIObject(const GDIObject: HGDIOBJ): Boolean; var aObject: TObject; begin Result := False; if GDIObject = 0 then Exit; aObject := TObject(GDIObject); if aObject is TObject then begin Result := (aObject is TQtFont) or (aObject is TQtBrush); end; end; thanks, -- Felipe Monteiro de Carvalho _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
