TabControl combined with WebBrowser Control results in Focus() Chaos in WPF

Question

Hi,

I have a problem concerning the WebBrowser Control and the tab Control.

i have a tab control containing 5 tab items. The first one hosts a third party webbrowser control that catches the mouse and only releases it after focusing it again e.g. I start the program and the web browser control is the first i see. above it there is the row of tab item "buttons". When i focus anything in the web browser element i can't switch to another tab item until i click on the web browser control again. that is so annoying and everything else but user-friendly. Is there a way for the tab items to be focused no matter what... or what the mouse has focused??? Why is the webbrowser control behaving like this anyways? thanks for your help in advance