how to grab the values from datagridview selected row to textbox

Private Sub frmVisitor_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
 
dbConnection.ConnectionString = _
        "Provider=Microsoft.Jet.OLEDB.4.0;Data Source =SNGPLDbase.mdb"
dbConnection.Open()
daVisitor = New OleDb.OleDbDataAdapter("Select * From Visitor", dbConnection)
cmdbVisitor = New OleDb.OleDbCommandBuilder(daVisitor)
daVisitor.Fill(dtVisitor) 'Because the DataTable doesn't hold a connection to the data source, you don't need to close it when you're finished.
 
        Dim ds As New DataSet
 
        Dim drNewRow As DataRow = dtVisitor.NewRow()
 
        dtVisitor.Columns(2).DataType = GetType(String)
 
        dtVisitor.Columns(0).AutoIncrement = True
        dtVisitor.Columns(0).AutoIncrementSeed = 10
        dtVisitor.Columns(0).AutoIncrementStep = 10
 
 
        DataGridView1.Refresh()
        DataGridView1.DataSource = dtVisitor.DefaultView
        DataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect
 
        cboVisitorCode.DataSource = dtVisitor.DefaultView
        cboVisitorCode.DisplayMember = "VisitorCode"
        AddHandler cboVisitorCode.SelectedIndexChanged, AddressOf cboVisitorCode_SelectedIndexChanged
 
 
    End Sub
 
Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
 
        Me.txtVisitorName.Text = ""
        Me.txtVehicleNo.Text = ""
 
End Sub
 
    Private Sub cboVisitorCode_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboVisitorCode.SelectedIndexChanged
 
'Modified code here for selected row feilds to textbox
'Also for direct select row from datagridview
 
'for example
     '   Me.txtVisitorName.Text= "Abc" 
     '   Me.txtVehicleNo.Text = "xyz250"
 
 
 
    End Sub