textbox validation only for charachters-WINDOWS

Private Sub TextBox3_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox3.KeyPress If (Microsoft.VisualBasic.Asc(e.KeyChar) < 65) _ Or (Microsoft.VisualBasic.Asc(e.KeyChar) > 90) _ And (Microsoft.VisualBasic.Asc(e.KeyChar) < 97) _ Or (Microsoft.VisualBasic.Asc(e.KeyChar) > 122) Then If (Microsoft.VisualBasic.Asc(e.KeyChar) <> 32) Then e.Handled = True End If End If ' Allowed backspace If (Microsoft.VisualBasic.Asc(e.KeyChar) = 8) Then e.Handled = False End If 'Allowed space End Sub