ShowPosterizeDlg example for C++ Builder

void __fastcall TForm1::ShowPosterizeDlg1Click(TObject *Sender) 
{
   L_INT nRet; 
   LEADDlgColor1->Levels = 2; 
   LEADDlgColor1->DlgFlags = DLG_POSTERIZE_SHOW_PREVIEW |
                           DLG_POSTERIZE_SHOW_TOOL_ZOOMLEVEL; 
   LEADDlgColor1->LEADImage = LEADImage1; 
   LEADDlgColor1->LEADDlgService = LEADDlgService1; 
   nRet= LEADDlgColor1->ShowPosterizeDlg ( this ); 
   if ( nRet == SUCCESS_DLG_OK ) 
   {
      LEADImage1->Posterize ( LEADDlgColor1->Levels ); 
   }
}