How to create a new column in WinForms GridListControl?

this.gridListControl1.Grid.QueryColCount += Grid_QueryColCount;
this.gridListControl1.Grid.QueryCellInfo += Grid_QueryCellInfo;

private void Grid_QueryColCount(object sender, GridRowColCountEventArgs e)
{
    e.Count = 3;
    e.Handled = true;
}

private void Grid_QueryCellInfo(object sender, GridQueryCellInfoEventArgs e)
{
    if (e.RowIndex > 0 && e.ColIndex == 3)
    {
        e.Style.CellValue = "testc";
    }
    if (e.RowIndex == 0 && e.ColIndex == 3)
    {
        e.Style.CellValue = "Col name";
    }
}

AddHandler Me.gridListControl1.Grid.QueryColCount, AddressOf Grid_QueryColCount
AddHandler Me.gridListControl1.Grid.QueryCellInfo, AddressOf Grid_QueryCellInfo

Private Sub Grid_QueryColCount(ByVal sender As Object, ByVal e As GridRowColCountEventArgs)
    e.Count = 3
    e.Handled = True
End Sub

Private Sub Grid_QueryCellInfo(ByVal sender As Object, ByVal e As GridQueryCellInfoEventArgs)
    If e.RowIndex > 0 AndAlso e.ColIndex = 3 Then
        e.Style.CellValue = "testc"
    End If
    If e.RowIndex = 0 AndAlso e.ColIndex = 3 Then
        e.Style.CellValue = "Col name"
    End If
End Sub