ShowColorResDlg example for C++ Builder

void __fastcall TForm1::ShowColorResDlg1Click(TObject *Sender) 
{
   L_INT nRet; 
   LEADDlgColor1->DlgFlagsEx = DLG_COLORRES_SHOW_BITALL |
                                DLG_COLORRES_SHOW_DITHER_ALL |
                                DLG_COLORRES_SHOW_PAL_ALL; 

   LEADDlgColor1->DlgFlags = DLG_COLORRES_SHOW_PREVIEW |
                           DLG_COLORRES_SHOW_OPENPALFILE |
                           DLG_COLORRES_SHOW_ORDER |
                           DLG_COLORRES_SHOW_TOOL_ZOOMLEVEL; 

   LEADDlgColor1->LEADImage = LEADImage1; 
   LEADDlgColor1->LEADDlgService = LEADDlgService1; 

   nRet= LEADDlgColor1->ShowColorResDlg ( this ); 
   if ( nRet == SUCCESS_DLG_OK ) 
   {
      LEADImage1->ColorRes ( LEADDlgColor1->BitsPerPixel, 
                             LEADDlgColor1->PaletteFlags, 
                             LEADDlgColor1->DitherFlags, 
                             0 );   
   }
}