thank you. This is working fine...
By the way:
There is a graphical bug when I do this!
When you click the tab on the ribbonbar, than everything is ok.
But if you select a tab with this code, than you have a line under the tab.
Please have a look on this picture:http://dennisdieckmann.de.funpic.de/ribbonbar.png
I'm using Q4 2006 release.