Winform无边框窗体实现拖动

winfrom窗体自带的边框不好看，可以将FormBorderStyle设置为None去除边框，但这样窗体无法拖动

下面记录无边框窗体拖动的几种方法[参考其他博主的]：

1.Form触发MouseDown事件时，记录鼠标坐标：

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1	rawPoint = e.Location;

MouseMove时根据鼠标坐标的移动偏移量，设置窗体位置同步变化：

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void Form1_MouseMove(object sender, MouseEventArgs e) {     if (e.Button != System.Windows.Forms.MouseButtons.Left)         return;     int x = e.X - rawPoint.X;     int y = e.Y - rawPoint.Y;     this.Location = new Point(this.Location.X + x, this.Location.Y + y); }

2.Form上方放置控件(如Label)来模拟边框，通过控件的MouseDown和MouseMove事件来实现,同方法1；

3.调用win32 api，Form的MoveDown触发时，向系统发送鼠标点击窗体非客户区的消息（模拟点击窗体边框）：

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[DllImport("user32.dll")] public static extern bool ReleaseCapture();   [DllImport("user32.dll")] public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);   private const int LeftButtonDown = 0xA1; private const int HTCaption = 0x02;   private void Form1_MouseDown(object sender, MouseEventArgs e) {     ReleaseCapture();     SendMessage((IntPtr)this.Handle, LeftButtonDown, HTCaption, 0); }

4.重写WndProc函数，拦截鼠标左击窗体的消息，改为左击窗体的非客户区：

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protected override void WndProc(ref Message m) {     switch (m.Msg)     {         case 0x0201:             {                 m.Msg = 0xA1;                 m.WParam = new IntPtr(2);                 m.LParam = new IntPtr(0);             }             break;     }     base.WndProc(ref m); }

以上方式均可实现窗体拖动。