Winform 没有FormBorder的情况下 支持鼠标移动窗体

 由于windows自带的系统窗体风格不一定满足不同用户的需求，所以有些form可能需要自定义外观  比如自定义最小化，最大化，关闭等这类图标及显示效果等，这种情况下我们需要设置FormBorderStyle为None，但没有border的窗体，没法支持鼠标拖动，以下给出两种方案供参考：

 

#region Support to move the form        // Solution 1        [DllImport("user32.dll")]        public static extern bool ReleaseCapture();        [DllImport("user32.dll")]        public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParan);        public const int HTCAPTION = 2;        public const int WM_SYSCOMMAND = 0x112;        public const int SC_MOVE = 0xf012;        private void frmTarget_MouseMove(object sender, MouseEventArgs e)        {            ReleaseCapture();            SendMessage(base.Handle, WM_SYSCOMMAND, SC_MOVE, 0);        }        // Solution 2        //private Point mouseOffset;        //private void frmTarget_MouseDown(object sender, MouseEventArgs e)        //{        //    mouseOffset = new Point(-e.X, -e.Y);        //}        //private void frmTarget_MouseMove(object sender, MouseEventArgs e)        //{        //    if (Control.MouseButtons == MouseButtons.Left)        //    {        //        Point mouseCoordinate = new Point(MousePosition.X, MousePosition.Y);        //        mouseCoordinate.Offset(mouseOffset);        //        this.Location = mouseCoordinate;        //    }        //}        #endregion