how to change the data grid view cell height and width at runtime?

DataGridView.RowHeadersWidth

DataGridView.ColumnHeadersHeight

DataGridViewRow.Height

DataGridViewColumn.Width

' Set height.
Private Sub Button5_Click(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles Button5.Click

    Dim row As DataGridViewRow = dataGridView.Rows(0)
    row.Height = 15
End Sub