Unable to underline Headertext in DataGridComboBoxColumn

[Henry]

I'm trying to underline the header text of a grid column. I've tried
using string.format with no results.

Any ideas/thoughts would be appreciated.

Tks....


Dim ComboTextCol As New DataGridComboBoxColumn

With ComboTextCol
.MappingName = "TestTypeID"
.HeaderText =
String.Format("FontStyle.Underline", "Test Type")
.Width = 100
.ColumnComboBox.DataSource =
ds2frmPUAT.Tables("PUATTestType").DefaultView
.ColumnComboBox.DisplayMember = "TestType"
.ColumnComboBox.ValueMember = "ID"
.NullText = ""
tableStyle.PreferredRowHeight =
.ColumnComboBox.Height

tableStyle.GridColumnStyles.Add(ComboTextCol)
End With

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