如何从Win32句柄获取System.Windows.Form实例？

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

public static Form GetFormFromHandle(IntPtr hwnd)
{
    Form form = Control.FromHandle(hwnd) as Form;
    return form;
}

IntPtr hwnd = new IntPtr(0x123456); // 替换为实际的Win32句柄
Form form = GetFormFromHandle(hwnd);