I created UserForm with one TextBox and "Close" Button. And it's works like a real-time search with my criteria. He is using AutoFilter to show what he found. And when I'm pressing Close Button the Focus isn't on Application, but on Hidden window (know because when I'm clicking alt+space form's menu shows).
To show window I'm using (running from hot-key):
to hide
How to resolve focus on actual Worksheet ?