Gridview Multiple Header

Question

I have an extended Gridview and want to add a control to the header for exporting. The problem is that I tried every solution I have found like adding a GridViewRow on the RowCreated event to the root table of the grid, but it doesn't show. Have anyone found a way around this particular issue? 

*For now I add the control to the last cell of the header, but it pushes the text down.