public SimpleVectorPointStyle(
   short code,
   Color color,
   double pointSize
);

public FontPointStyle(
   short code,
   Font font,
   short angle,
   Color color,
   double pointSize
);

public BitmapPointStyle(
   string strName,
   BitmapStyles style,
   Color color,
   double pointSize
);

Code
        protected void Page_Load(object sender, System.EventArgs e)
        {
            if (StateManager.IsManualState())
            {
                MapInfo.Mapping.Map myMap = GetMapObj();
                if (Session.IsNewSession)
                {
                    MapInfo.WebControls.MapControlModel controlModel = MapControlModel.SetDefaultModelInSession();

//instanciate AppStateManager class
                    AppStateManager myStateManager = new AppStateManager();
                    //put current map alias to state manager dictionary
                    myStateManager.ParamsDictionary[StateManager.ActiveMapAliasKey] = this.MapControl1.MapAlias;
                    //put state manager to session
                    StateManager.PutStateManagerInSession(myStateManager);

#region 测试代码

if (myMap != null)
                    {
                        if (myMap.Layers["TempLayerAlias"] != null)
                        {
                            myMap.Layers.Remove("TempLayerAlias");
                        }
                    }
                    // Need to clean up "dirty" temp table left by other customer requests.
                    MapInfo.Engine.Session.Current.Catalog.CloseTable("TempTableAlias");
                    // Need to clear the DefautlSelection.
                    MapInfo.Engine.Session.Current.Selections.DefaultSelection.Clear();

// Creat a temp table and AddPintPointCommand will add features into it.
                    MapInfo.Data.TableInfoMemTable ti = new MapInfo.Data.TableInfoMemTable("TempTableAlias");
                    // Make the table mappable
                    ti.Columns.Add(MapInfo.Data.ColumnFactory.CreateFeatureGeometryColumn(myMap.GetDisplayCoordSys()));
                    ti.Columns.Add(MapInfo.Data.ColumnFactory.CreateStyleColumn());

MapInfo.Data.Table table = MapInfo.Engine.Session.Current.Catalog.CreateTable(ti);
                    // Create a new FeatureLayer based on the temp table, so we can see the temp table on the map.
                    myMap.Layers.Insert(0, new FeatureLayer(table, "templayer", "TempLayerAlias"));

IMapLayer lyr = myMap.Layers["TempLayerAlias"];
                    if (lyr == null) return;
                    FeatureLayer fLyr = lyr as FeatureLayer;

MapInfo.Geometry.DPoint point = new DPoint(100, 20);
                    MapInfo.Geometry.Point geoPoint = new MapInfo.Geometry.Point(myMap.GetDisplayCoordSys(), point);
                    
                    // 创建内置MapInfo符号图标
                    SimpleVectorPointStyle vStyle = new SimpleVectorPointStyle();
                    vStyle.Code = 67;
                    vStyle.Color = Color.Red;
                    vStyle.PointSize = Convert.ToInt16(48);
                    vStyle.Attributes = StyleAttributes.PointAttributes.BaseAll;
                    vStyle.SetApplyAll();

// Create a Feature which contains a Point geometry and insert it into temp table.
                    Feature feature = new Feature(geoPoint, vStyle);
                    MapInfo.Data.Key key = fLyr.Table.InsertFeature(feature);

//创建自定义位图样式
                    //位图相对于位置C:\Program Files\Common Files\MapInfo\MapXtreme\6.8.0\CustSymb
                    string fileName = @"AMBU1-32.BMP";
                    BitmapPointStyle bStyle = new BitmapPointStyle(fileName);
                    bStyle.PointSize = Convert.ToInt16(24);
                    bStyle.NativeSize = true;
                    bStyle.Attributes = StyleAttributes.PointAttributes.BaseAll;
                    bStyle.SetApplyAll();

point = new DPoint(140, 55);
                    geoPoint = new MapInfo.Geometry.Point(myMap.GetDisplayCoordSys(), point);
                    feature = new Feature(geoPoint, bStyle);
                    key = fLyr.Table.InsertFeature(feature);

//添加字体图样式
                    //FontPointStyle fStyle = new FontPointStyle();
                    //fStyle.Color = Color.Red;
                    //fStyle.Font.Name = "NewCom Vehicle";
                    //fStyle.PointSize = Convert.ToInt16(24);
                    //fStyle.Attributes = StyleAttributes.PointAttributes.BaseAll;
                    //fStyle.SetApplyAll();

FontPointStyle fStyle = new FontPointStyle();
                    fStyle.Code = 66;
                    fStyle.PointSize = 48;
                    fStyle.Color = System.Drawing.Color.Red;
                    fStyle.Font.Name = "Uniwill";
                    fStyle.Font.FontWeight = MapInfo.Styles.FontWeight.Bold;
                    fStyle.Angle = 900;

point = new DPoint(180, 85);
                    geoPoint = new MapInfo.Geometry.Point(myMap.GetDisplayCoordSys(), point);
                    feature = new Feature(geoPoint, fStyle);
                    key = fLyr.Table.InsertFeature(feature);

#endregion
                }

// Now Restore State
                StateManager.GetStateManagerFromSession().RestoreState();
            }
        }

Code
        // At the time of unloading the page, save the state
        protected void Page_UnLoad(object sender, System.EventArgs e)
        {
            if (StateManager.IsManualState())
            {
                StateManager.GetStateManagerFromSession().SaveState();
            }
        }

private MapInfo.Mapping.Map GetMapObj()
        {
            MapInfo.Mapping.Map myMap = MapInfo.Engine.Session.Current.MapFactory[MapControl1.MapAlias];
            if (myMap == null)
            {
                myMap = MapInfo.Engine.Session.Current.MapFactory[0];
            }
            return myMap;
        }