How to Indent TabStrip of a TabControl

Hi

I have a Window with a Grid containing some Labels and TextBoxes and then a TabControl. In order to improve the Layout I need to "move" the TabStrip from the top left corner to the right.

I know that by using the TabStripPlacement property I can place the TabStrip on top, left, right or at the bottom of the TabControl. But I want to keep it at the top, just ca. 120 px right of the left corner. 

Can anybody help me to achieve this?

Thank you in advance.

Peter