C# MapX 怎么添加bmp作为自定义的标签

C# MapX 如何添加bmp作为自定义的标签
已成功添加了图元,但是想在其前面添加自定义的bmp文件。
C# code
MapXLib.Layer tempstar_lyr;
            MapXLib.CoordSys coor = axMap1.DisplayCoordSys;

            tempstar_lyr = axMap1.Layers.CreateLayer("temp_start", Type.Missing, 100, 10, coor);
            tempstar_lyr.Editable = true;
            tempstar_lyr.Visible = true;
            tempstar_lyr.AutoLabel = true;
            tempstar_lyr.OverrideStyle = true;
            tempstar_lyr.Style.SymbolFontColor = 0x0000FF;
            tempstar_lyr.Style.SymbolType = (short)MapXLib.SymbolTypeConstants.miSymbolTypeVector;
            tempstar_lyr.Style.SymbolVectorSize = 20;
            
            MapXLib.Feature SymbolObj = new MapXLib.Feature();
            SymbolObj.Attach(axMap1.GetOcx());
            SymbolObj.KeyValue = "AAAAAAAAAAAAAAAAAAAAAAA";
            SymbolObj.Point = pts;
            tempstar_lyr.AddFeature(SymbolObj, Type.Missing);
            //tempstar_lyr.Refresh();
            tempstar_lyr.Editable = false;



------解决方案--------------------
axMap1.Layers.AnimationLayer = mlayer
ftr = new MapXLib.FeatureClass();
ftr.Attach(axMap1.GetOcx()); //这里是必须的
ftr.Type = MapXLib.FeatureTypeConstants.miFeatureTypeSymbol;

MapXLib.Style sty;
sty = new MapXLib.StyleClass();
//定义点图元的样式
sty.SymbolType = MapXLib.SymbolTypeConstants.miSymbolTypeBitmap;//指定为位图样式
sty.SymbolBitmapSize = 20;//指定图元大小
sty.SymbolBitmapName = "TEMP1-32.BMP";////位图文件必须放在安装目录的CUSTSYMB //文件夹下 ,一般在C:\Program Files\MapInfo\MapX 5.0\CUSTSYMB
sty.SymbolBitmapTransparent = true;//指定位图透明,和图层融为一体
sty.SymbolBitmapOverrideColor = false;
sty.SymbolFontColor = 0x08f780 
ftr.Style = sty;
ftr.Point.Set(X, Y);