I got a problem with focus on a textbox. 

I got a global shortcut for my application to set focus on the textbox of the app.

If i use the shortcut i'm doing this:

```
this(Window).Activate()

wantedTextbox.Focus()

Keyboard.Focus(wantedTextbox) // just for testing

```

So it works with e.g. the internet browser, but it won't work with any text-editor. I get focus on the textbox + activate the Window, but if i write, i write into the notepad/VS...

Would be really pleased if somebody got a clue for my issue.