DataGrid Column header height

[Nightfall]

I just want to know if it's possible to change the height of the column header in a DataGrid. I have found options for bouth height and width og the row header, but only width option for the column header.

Is it changable, and in that case; how do I change it?

(I need to write two lines of text in the header, and if I can't change the header height, the bottom line will not be shown)

Thanks for all answers! I am really stuck here... :(

[Nightfall]

plz! I am really stuck here. If anyone have any idea, that might solve my problem, or you have seen this problem before, plz tell me!