Winform窗口拖動

        #region Windows拖動
        [DllImport("user32.dll")]
        public static extern bool ReleaseCapture();
        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        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;
        /// <summary>
        /// ListView更改間距需要的參數
        /// </summary>
        public const int LVM_SETICONSPACING = 0x1035; 

        /// <summary>
        /// 拖動form
        /// </summary>
        /// <param name="frm"></param>
        protected void DragForm(Form frm)
        {
            ReleaseCapture();
            SendMessage(frm.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
        }
        #endregion

鼠標拖動調用方法

 private void pnlTop_MouseDown(object sender, MouseEventArgs e)
        {
            DragForm(this);
        }