some keys don't work in the tool window of VS 2010 extension

I created a vs 2010 extension with a tool window. I have a browser inside my tool window. When i type text in the browser everything works fine but when i click on some keys lik开发者_StackOverflow社区e "enter" or "backspace" the action is being made on the source code editor of VS and not in the browser inside my tool window.

Any idea why ?!

---

My question was answered in msdn: http://social.msdn.microsoft.com/Forums/en-US/vsx/thread/57eebe60-59c0-471c-9540-7fbb13d0b4e7/

Just follow the example in the last post and it'll work fine.