Is there any reason why you didn't just use a ContextMenuStrip component and set the ShortCutKeys property of each item, instead of 'faking' the ShortCut display by setting it in the text?

It's not really a big difference I suppose, but this way there is a rather large empty space to the right of the shortcut letters which I think is not there if you just assign the ShortCutKeys property?

Otherwise nice and usefull control, saves alot of time if you gotta make RTB's often