ShowAverageDlg example for C++ Builder

void __fastcall TForm1::ShowAverageDlg1Click(TObject *Sender) 
{
   L_INT nRet; 
   LEADDlgImgEffect1->DlgFlags = DLG_AVERAGE_SHOW_PREVIEW |
                        DLG_AVERAGE_SHOW_TOOL_ZOOMLEVEL; 

   LEADDlgImgEffect1->LEADImage = LEADImage1; 
   nRet= LEADDlgImgEffect1->ShowAverageDlg ( this ); 
   if ( nRet == SUCCESS_DLG_OK ) 
   {
      LEADImage1->Average (LEADDlgImgEffect1->Dimension ); 
   }
}