como obtener datos de un datagrid a un textbox

[Peterpay]

Aqui tengo un ejemplo 1 seg.

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
ad.Fill(ds, "stud")
TxtRoll.DataBindings.Add("text", ds, "stud.roll")
TxtName.DataBindings.Add("text", ds, "stud.name")
TxtAddress.DataBindings.Add("text", ds, "stud.address")

DataGrid1.DataSource = ds.Tables(0)
cur = CType(Me.BindingContext(ds, "stud"), CurrencyManager)
rec()
End Sub