// Get the selected color from the CColorDialog.
CColorDialog dlg;
if (dlg.DoModal() == IDOK)
{
   COLORREF color = dlg.GetColor();
   TRACE("RGB value of the selected color - red = %u, 
      green = %u, blue = %u\n",
      GetRValue(color), GetGValue(color), GetBValue(color));
}