【解决办法】关键接口是MarkerSymbolID,具体代码如下:
// 实例化一个点几何对象,并对其进行风格设置
GeoStyle geoStyle_P = new GeoStyle();
geoStyle_P.MarkerAngle = 14.0;
geoStyle_P.MarkerSize = new Size2D(10, 10);
geoStyle_P.MarkerSymbolID = 303;
GeoPoint geoPoint = new GeoPoint();
geoPoint.X = 100.0;
geoPoint.Y = 100.0;
geoPoint.Style = geoStyle_P;