c#如何實現無標題欄窗口程序的移動?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace CallBuilder
...{
    public partial class Iformest : Form
    ...{

        [DllImport("User32.dll", EntryPoint = "SendMessage")]
        private static extern int SendMessage(int hWnd, int Msg, int wParam, int lParam);
        [DllImport("User32.dll", EntryPoint = "ReleaseCapture")]
        private static extern int ReleaseCapture(); 


       

        public Iformest(Form newform)
        ...{
            InitializeComponent();
             


            this.myForm.MyFormMouseDown += new MouseEventHandler(myForm_MyFormMouseDow
n);
           


            

        }

       
        void myForm_MyFormMouseDown(object sender, MouseEventArgs e)
        ...{
          

            if (e.Button == MouseButtons.Left)
            ...{
                ReleaseCapture();
                SendMessage(this.Handle.ToInt32(), 0x0112, 0xF012, 0);
            } 

        }