[DevExpress]XtraTabControl右键添加关闭当前页、关闭其他页、全部关闭的实现

private void xtraTabControl_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                xtraTabControl.ContextMenuStrip = null;

                //TreeListHitInfo hInfo = treeList1.CalcHitInfo(new Point(e.X, e.Y));
                //TreeListNode node = hInfo.Node;
                //treeList1.FocusedNode = node;
   
                xtraTabControl.ContextMenuStrip = contextMenuStrip1;
                
            }
        }

        private void xtraTabControl_MouseUp(object sender, MouseEventArgs e)
        {
            //TreeList tree = sender as TreeList;
            //if (e.Button == MouseButtons.Right
            //        && ModifierKeys == Keys.None
            //        && treeList1.State == TreeListState.Regular)
            //{
            //    Point p = new Point(Cursor.Posit