ShowAntiAliasDlg example for Delphi

procedure TForm1.ShowAntiAliasDlg1Click(Sender: TObject); 
var
   nRet: L_INT; 
begin

   LEADDlgImgEffect1.DlgFlags:= DLG_ANTIALIAS_SHOW_PREVIEW Or
                                 DLG_ANTIALIAS_SHOW_TOOL_ZOOMLEVEL; 

   LEADDlgImgEffect1.LEADImage:= LEADImage1; 

   nRet:= LEADDlgImgEffect1.ShowAntiAliasDlg ( Self ); 
   if ( nRet = SUCCESS_DLG_OK ) then
   begin
      LEADImage1.AntiAlias (LEADDlgImgEffect1.Threshold, 
                             LEADDlgImgEffect1.Dimension, 
                             LEADDlgImgEffect1.AntiAliasFilterType ); 
   end; 
end;