自定义 mapxtreme CustSymb文件夹
String bitMapPath = Application.StartupPath +@"\BMP";
MapInfo.Styles.StyleRepository styleRepository = MapInfo.Engine.Session.Current.StyleRepository;
MapInfo.Styles.BitmapPointStyleRepository bmpPointStyleRepository = styleRepository.BitmapPointStyleRepository;
bmpPointStyleRepository.Reload(bitMapPath);