c# winform在窗体topmost=true的情况下调用exe

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WindowsFormsApplication1{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();            //窗体            this.TopMost = true;//将窗体的topmost设为true            this.Size = new Size(800, 600);            //panel            Panel pnl = new Panel();            pnl.BorderStyle = BorderStyle.FixedSingle;            pnl.Size = new Size(764, 500);            pnl.Location = new Point(10, 10);            this.Controls.Add(pnl);            //WebBrowser            WebBrowser wb = new WebBrowser();            wb.Navigate("http://www.baidu.com");            wb.Dock = DockStyle.Fill;            wb.ScrollBarsEnabled = false;            pnl.Controls.Add(wb);            //画图            Button btnMspaint = new Button();            btnMspaint.Text = "画图";            btnMspaint.Location = new Point(10, 10 + pnl.Height + 5);            btnMspaint.Click += new EventHandler(btnMspaint_Click);            this.Controls.Add(btnMspaint);        }        private delegate void MyDelegate();        /// <summary>        /// 画图        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        void btnMspaint_Click(object sender, EventArgs e)        {            ////方法一（缺点：在调用mspaint.exe时主体界面会变得模糊）            //this.TopMost = false;//将窗体的topmost设为false            ////启动进程打开电子画笔            //System.Diagnostics.Process process = new System.Diagnostics.Process();            //process.StartInfo.FileName = Application.StartupPath + @"\exe\mspaint.exe";            //process.Start();            //process.WaitForExit();//等待关闭电子画笔            //process.Close();//关闭进程            //this.TopMost = true;//将窗体的topmost设为true            //方法二（缺点：在调用mspaint.exe时主界面可以被选择并且可以被关闭）            System.Diagnostics.Process process = new System.Diagnostics.Process();            process.StartInfo.FileName = Application.StartupPath + @"\exe\mspaint.exe";            process.EnableRaisingEvents = true;            process.Exited += new EventHandler(process_Exited);            process.Start();            this.TopMost = false;        }        /// <summary>        /// 调用委托将窗体的topmost=true        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        void process_Exited(object sender, EventArgs e)        {            MyDelegate myDelegate = new MyDelegate(SetFormTopMostToTrue);            this.Invoke(myDelegate);        }        private void SetFormTopMostToTrue()        {            this.TopMost = true;        }    }}