A colleague of mine came to me the other day with a challenging thing: the UX team is requesting to have some tool tips that, when pressing Ctrl key, should expand and show more details, more content.

This is tricky because of a number of reasons. First of all, tooltips don’t get focus so they can’t subscribe to any KeyDown events. Second, tooltips don’t inherit the DataContext from the parent control so the communication between the parent and the tooltip is a bit harder.