How to disable the WPF tabItem Background when mouseOver

Question

I already set the Background and the Border of the TabItem to Transparent. However, when my mouse is over the TabItem, the Background of the TabItemwill turn to grey color. Does anyone how to disable the Background when the tabitems are being mouse over? I found a link here, but it doesn't work for me.

Image before mouse over:

Image after mouse over:

Answer 1

You can have full control over control appearance by customize its style. If you have Expression blend, it will be easier. Here's a very nice tutorial