Adding Control to DGV ColumnHeader

Hi,

With 1.3.61 release, I am trying to figure out how to add CheckBox control in DGV ColumnHeader but no luck. I can put the control in the TopLeftHeaderCell and RowHeader though.

I considered using the GetCellDisplayRectangle method the way I do it in WinForm but unfortunately, it is not available in Wisej.

Am I missing something obvious?

Thanks.