void CMenuView::OnRButtonDown(UINT nFlags, CPoint point)
{
CMenu menu;
menu.CreatePopupMenu();
menu.AppendMenuW(MF_BYCOMMAND | MF_STRING, ID_RIGHT_CLEAR, _T("剪切（&X）"));
menu.AppendMenuW(MF_BYCOMMAND | MF_STRING, ID_RIGHT_COPY, _T("復制（&C）"));
menu.AppendMenuW(MF_BYCOMMAND | MF_STRING, ID_RIGHT_PASTE, _T("粘貼（&P）"));
menu.AppendMenuW(MF_SEPARATOR);
menu.AppendMenuW(MF_BYCOMMAND | MF_STRING, ID_RIGHT_CLEAR, _T("清除\tCtrl + C"));
ClientToScreen(&point);
menu.TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTALIGN, point.x, point.y, this);
CView::OnRButtonDown(nFlags, point);
}