I have a WPF application that makes use of the PreviewKeyUp function to handle keystrokes before they might otherwise be dealt with.
It works fine, but often (not always) if I switch to another windows application and then back, it just stops working. If I interact with anything on the form that can accept focus (say a button, or a text box), it starts working again.
It's the lack of consistency that kills me.
If anyone has ANY suggestions on where to start looking, I would be most grateful.
Thanks in advance,
Aibynn