1. using cdrapp = Corel.Interop.VGCore.Application;
    2. using corel = Corel.Interop.VGCore;
    4.         public static cdrapp capp;
    6.             capp.ActiveDocument.BeginCommandGroup("开始记录操作");//记录操作
    7.             capp.Optimization = true;//应用程序优化，阻止界面刷新
    8.             capp.ActiveDocument.Unit = corel.cdrUnit.cdrMillimeter;//设置文档单位
    9.             capp.ActiveDocument.ReferencePoint = corel.cdrReferencePoint.cdrCenter;//设置参考点为中心点
    10.             .    
    11.             .    
    12.             .
    13.             capp.ActiveDocument.EndCommandGroup();//结束记录操作
    14.             capp.Application.Optimization = false; //恢复界面刷新
    15.             capp.ActiveWindow.Refresh(); //刷新当前界面