/// <summary>
 /// 移动窗体
 /// </summary>
 /// <param name="form"></param>
 public static void moveWindow(this Form form)
 {
     WindowsUtil.ReleaseCapture();
     WindowsUtil.SendMessage(form.Handle, WindowMessage.WM_NCLBUTTONDOWN, WindowHitTest.HTCAPTION, 0);
 }