C# Winform无边框移动窗体

        #region 鼠标拖动          [DllImport("user32.dll")]         public static extern bool ReleaseCapture();         [DllImport("user32.dll")]         public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);         public const int WM_SYSCOMMAND = 0x0112;         public const int SC_MOVE = 0xF010;         public const int HTCAPTION = 0x0002;          private void panel1_MouseDown(object sender, MouseEventArgs e)         {             ReleaseCapture();             SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);         }         #endregion

     #region 移动窗体          [DllImport("user32.dll")]         public static extern bool Rese();         protected override void WndProc(ref Message m)         {             switch (m.Msg)             {                 case 0x84:                     base.WndProc(ref m);                     if (m.Result == (IntPtr)0x1)                     {                         m.Result = (IntPtr)2;                         return;                     }                     break;             }             base.WndProc(ref m);         }         #endregion