如何将ContextMenuStrip添加到ToolStripButton？

I have a toolstrip containing, among other things, a ToolStripComboBox and a ToolStripButton. I want to add a ContextMenuStrip to both of them, but I don't have direct access to the toolstrip or its other contents, so I can't set the context menu of the toolstrip.I have a toolstrip containing, among other thin