把一个窗体嵌入到WinForm中进行显示，以CMD窗口为例

[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 btn_ThreadPool_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);

}