Rob,
You will have to use the Find function on the BindingSource (assuming you
are databound) or enumerate each row/cell and look for your value.
For the binding source, try:
Dim view1 As New DataView(tables(0))
' Create a DataGridView control and add it to the form.
Dim datagridview1 As New DataGridView()
datagridview1.AutoGenerateColumns = True
Me.Controls.Add(datagridview1)
' Create a BindingSource and set its DataSource property to
' the DataView.
Dim source1 As New BindingSource()
source1.DataSource = view1
' Set the data source for the DataGridView.
datagridview1.DataSource = source1
' Set the Position property to the results of the Find method.
Dim itemFound As Integer = source1.Find("artist", "Natalie Merchant")
source1.Position = itemFound
From MSDN:
https://msdn2.microsoft.com/en-us/library/ms158165.aspx
Hope this helps,
Steve