窗体内嵌外部程序的显示,获取控件的图片

#region  窗体内嵌外部程序的显示

[DllImport("User32.dll ", EntryPoint = "SetParent")]
private static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
[DllImport("user32.dll ", EntryPoint = "ShowWindow")]
public static extern int ShowWindow(IntPtr hwnd, int nCmdShow);

private void button1_Click(object sender, EventArgs e)
{
    Process p = new Process();
    p.StartInfo.FileName = "cmd.exe ";
    p.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Minimized;//加上这句效果更好    
    p.Start();
    System.Threading.Thread.Sleep(100);//加上，100如果效果没有就继续加大   
    SetParent(p.MainWindowHandle, panel1.Handle); //panel1.Handle为要显示外部程序的容器   
    //ShowWindow(p.MainWindowHandle, 3);
}


#endregion

/// <summary>
/// 获取控件的图片
/// </summary>
/// <param name="Obj"></param>
/// <returns></returns>
private Bitmap DrawMeToBitmap(Control Obj)
{
    Bitmap bmp = new Bitmap(Obj.Width,Obj.Height);
    Graphics g = Graphics.FromImage(bmp);
    using (Brush backColorBrush = new SolidBrush(Obj.BackColor))
    {
        g.FillRectangle(backColorBrush, new Rectangle(0, 0, bmp.Width, bmp.Height));
        foreach (Control ctl in Obj.Controls)
        {
            using (Bitmap b = new Bitmap(ctl.Width, ctl.Height))
            {
                ctl.DrawToBitmap(b, ctl.ClientRectangle);
                g.DrawImage(b, ctl.Location);
            }
        }
    }
    return bmp;
}