问题
I have two different grid controls on the same form. They share the same context menu. I am having trouble determining which control is the owner when I select the context menu item.
回答1:
SourceControl property on the ContextMenuStrip class will show the last control that caused that menu strip to be shown.
回答2:
The event handler for the MenuItem's Click event will have a Sender parameter. This object should be the control that had the focus when the context menu was displayed.
来源：https://stackoverflow.com/questions/244002/vb-net-desktop-context-menu-assigned-to-multiple-controls-owner-problem