[RESOLVED] Sort Datagridview by multiple columns?

How do I sort a DGV by multiple columns. I've seen a few discussions on the topping while searching google, but I don't understand what is going on.

Plz help me

Code:

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Dim table = New DataTable()
table.Columns.Add("Letter", GetType(Char))
table.Columns.Add("Number", GetType(Integer))

table.Rows.Add("A"c, 1)
table.Rows.Add("B"c, 3)
table.Rows.Add("A"c, 3)
table.Rows.Add("A"c, 2)
table.Rows.Add("B"c, 2)
table.Rows.Add("B"c, 1)

'//apply sort on Letter, then Number column
table.DefaultView.Sort = "Letter, Number"

Me.DataGridView1.DataSource = table

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