[SaLoOoMX]

تفضل اخي الكريم

كود :

Private Sub TextBox1_KeyPress(sender As Object, e As KeyPressEventArgs) Handles TextBox1.KeyPress
        If e.KeyChar <> ChrW(Keys.Back) Then
            If Char.IsLetter(e.KeyChar) Then
            Else
                e.Handled = True
            End If
        End If
    End Sub