C#下如何實現無標題可拖動窗口

 

1。重寫Wndproc

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsExample
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
        protected override void WndProc(ref Message m)
        {
            if (m.Msg == 0x0201)  //鼠標左鍵按下去的消息
            {
                m.Msg = 0x00A1;   //更改消息爲非客戶區按下鼠標
                m.LParam = IntPtr.Zero;  //默認值
                m.WParam = new IntPtr(2);  //鼠標放在標題欄內
            }
            base.WndProc(ref m);
        }
    }
}

 

 

2。調用API函數

    [DllImport("user32.dll")]
        public static extern IntPtr SendMessage(IntPtr hWnd, int msg, int wparam, int lparam);
 
        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);
            if (e.Button == MouseButtons.Left)//按下的是鼠標左鍵            
            {
                Capture = false;//釋放鼠標，使能夠手動操作                
                SendMessage(Handle, 0x00A1, 2, 0);//拖動窗體            
            }
        }