Programmatically size a DataGridView

Hi, I posted this in the 'windows forms data controls & databinding forum' but didn't get any response -- so am trying here as well. i'd like to set up a DataGridView with: (a) just a horizontal scroll bar at design time (b) porgrammatically size it vertically to accomodate all rows plus the column header, unless the number rows exceeds N, in which case, programmatically add a vertical scroll bar. The datagridview will not be bound to any data-source. Instead i programmatically add rows to its (initially empty) DataGridViewRowCollection. I have experimented with trying to programmatically determine the height to set it to with the following code: dgv.height = dgv.rows.GetRowsHeight(DataGridViewElementStates.None) + dgv.columnHeadersHeight // where dgv is my DataGridView instance Anyway, this does not seem to work - it falls short of the height it should be. As such, any idea how i'd do (b)? Thanks, Mark