DevExpress官网

关键代码：

private void richEditControl1_PopupMenuShowing(object sender, DevExpress.XtraRichEdit.PopupMenuShowingEventArgs e)

     {

            DXMenuItem item = new DXMenuItem();

            item.Caption = "Create new document";

            item.Click += new EventHandler(this.createNewDocumentItemClick);

            e.Menu.Items.Add(item);

}

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