ShowMultiplyDlg example for Delphi

procedure TForm1.ShowMultiplyDlg1Click(Sender: TObject);
var
   nRet: L_INT; 
begin

   LEADDlgImgEffect1.Factor:= 400; 
   LEADDlgImgEffect1.DlgFlags:= DLG_MULTIPLY_SHOW_PREVIEW Or
                           DLG_MULTIPLY_SHOW_TOOL_ZOOMLEVEL; 

   LEADDlgImgEffect1.LEADImage:= LEADImage1; 

   nRet:= LEADDlgImgEffect1.ShowMultiplyDlg ( Self ); 
   if ( nRet = SUCCESS_DLG_OK ) then
   begin
      LEADImage1.Multiply (LEADDlgImgEffect1.Factor ); 
   end; 
end;