Customizing the header row in GridView

Hello everyone,

I am interested in customizing the container in which the header row
is rendered in for the GridView. I know that you can customize the
container in which each individual GridViewColumnHeader is rendered,
but I am interested in customizing the actual row and not each
column.

One way that I have tried to accomplish this is to layer the listView
on top of the custom rendering that I want and set the background of
each header to null. But this is not a good solution because the
height of the custom rendering is not in sync with the height of the
column header row. However, I get very close to the look that I want.

Does anyone have any suggestions or hints on how I should accomplish
this?