How to forward part of input from one control to another without losing focus?

Question

Using WPF how can I do similar thing as done in Skype contacts window? I want to be able to press on any list item with mouse, be able to use Up/Down to navigate and filter contacts when I start typing. I also want to show what I'm typing in separated TextBox.

So far I have all filtering set up through TextBox. I can navigate with arrows when TreeView is focused and filter when entering text inside TextBox.

Answer 1

I don't have skype, but I think you'll have to catch those up/down keys from the keyboard and send them to your treeview if I understand your question well.

... or perhaps this link helps!

Answer 2

You might be interested in the PreviewXXXX functions, which lets you catch key presses before they get to the listbox.