C# 用Process的方法打开完美世界

/// <summary>
/// 完美世界的句柄
/// </summary>
IntPtr handle_wmsj;

/*
     IntPtr h = 
     p.MainWindowHandle 等同 FindWindow("ElementClient Window", comboBox1.Text);

    通过pid获得对应的MainWindowHandle
*/

/// <summary>
/// 启动完美世界 的进程
/// </summary>
Process p_wmsj;
private void btnStart_Click(object sender, EventArgs e) {
  richTextBox1.  Text = Path.GetDirectoryName(textBox_GamePath.Text); 
    p_wmsj = new Process();
    p_wmsj.StartInfo.WorkingDirectory = Path.GetDirectoryName(textBox_GamePath.Text);// @"D:PGPgamesarc_w2i_20210609element";
    p_wmsj.StartInfo.FileName = textBox_GamePath.Text;//"D:PGPgamesarc_w2i_20210609elementelementclient.exe"
    p_wmsj.StartInfo.Arguments = " game:pw ";//参数
    p_wmsj.StartInfo.WindowStyle = ProcessWindowStyle.Normal;
   
    p_wmsj.Start();
    timer2.Enabled = true;
}

private void timer2_Tick(object sender, EventArgs e) {

    handle_wmsj = p_wmsj.MainWindowHandle;// p.MainWindowHandle 等同 FindWindow("ElementClient Window", comboBox1.Text);

    if ((int)handle_wmsj > 0)
    {
        timer2.Enabled = false;
        SetWindowText(handle_wmsj, "我的计算器");
        comboBox3.Text = "" + handle_wmsj;
       
    }
    SetForegroundWindow(handle_wmsj);
}


[DllImport("user32.dll", EntryPoint = "SetWindowText", CharSet = CharSet.Ansi)]
public static extern int SetWindowText(IntPtr hwnd,string lpString);