visio二次开发--判断文档是否已发生变化(变化就加星号*)

private void VisApplication_EnterScope(Visio.Application app, int scopeID, String description)//故障树文档发生改变，要记录，关闭时提示保存
        {
            axDrawingControl1.Document.Pages[1].CellChanged -= new EPage_CellChangedEventHandler(Form_paint_CellChanged);//文档发生更改事件
            axDrawingControl1.Document.Pages[1].CellChanged += new EPage_CellChangedEventHandler(Form_paint_CellChanged);//文档发生更改事件
            //   Console.WriteLine("$currentScope.tostring$" + app.CurrentScope.ToString()+ "$ID$" + scopeID.ToString() + "$Des$" + description);
            /*
             1188$ID$1188$Des$设置对象大小;0
            delete=1486,//删除对象
            dragInto=1246,//拖入图形
            moveShape = 1187,//移动对象
            shapeData=1312,//形状数据
            changePageSize=1239,//更改页面大小
            changeShapeSize = 1189,//设置对象大小
            paste = 1022 //粘贴
            paste2 = 1158 //粘贴
            1501//插入注释
            */
            if (scopeID == 1486 || scopeID == 1246 || scopeID == 1187 || scopeID == 1312 || scopeID == 1239 || scopeID == 1189 || scopeID == 1022 || scopeID == 1158 || scopeID == 1188 || scopeID == 1501)
            {
                needSave = true;//变化了，需要保存到临时文件夹

                string temp = TabControl.SelectedTab.Text;
                if (temp[temp.Length - 5] != '*')
                {
                    TabControl.SelectedTab.Text = temp.TrimEnd() + " *    ";
                }
            }
        }