How to transfer a key press to a different window?

When any of a certain set of keys is pressed, I want to move the focus to a second window and have the code for that window handle the keypress, just as if that key had been pressed when that second window already had the focus.

How do I do that? I know there's an EmulateKeyPress method out there, but that seems to be only for wx.TextCtrl's.

Bob