c# 实现无标题栏的窗体移动

最新推荐文章于 2025-08-15 14:15:17 发布

转载最新推荐文章于 2025-08-15 14:15:17 发布 · 910 阅读

文章标签：

#c# #user #object

本文介绍两种实现Windows窗体应用中禁用窗口最大化功能及允许任意位置拖动的方法：一是重写WndProc()函数，二是利用消息机制结合DllImport调用用户32位DLL库函数。

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方法一：重寫WndProc（）

protected override void WndProc(ref Message m)
        {
            const int WM_NCHITTEST = 0x84;
            const int HTCLIENT = 0x01;
            const int HTCAPTION = 0x02;
            const int WM_SYSCOMMAND = 0x112;
            const int SC_MAXMIZE = 0xF030;
            const int WM_NCLBUTTONDBLCLK = 0xA3;
            switch (m.Msg)
            {
                case 0x4e:
                case 0xd:
                case 0xe:
                case 0x14:
                    base.WndProc(ref m);
                    break;
                case WM_NCHITTEST://鼠标点任意位置后可以拖动窗体

                    this.DefWndProc(ref m);
                    if (m.Result.ToInt32() == HTCLIENT)
                    {
                        m.Result = new IntPtr(HTCAPTION);
                        return;
                    }
                    break;
                case WM_NCLBUTTONDBLCLK://禁止双击最大化
                    Console.WriteLine(this.WindowState);

return;

break;

default:

                    base.WndProc(ref m);
                    break;
            }

}

方法二：消息機制

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)]
public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);

[DllImport("user32.dll")]
static extern bool ReleaseCapture();

        const int WM_SYSCOMMAND = 0x0112;
        const int HTCAPTION = 0x02;
        const int SC_MAXMIZE = 0xF030;
        const int SC_MOVE = 0xF010;
        const int WM_NCLBUTTONDBLCLK = 0xA3;

        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            ReleaseCapture();

SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
}