Keypress Character Validation...Code Cleanup Help

[hipopony66]

I know that this is not the best way of doing this, so I am looking for suggestions for cleaning this up. Currently, it only allows the user to enter Alpha characters, spaces, and press the enter and backspace key in a textbox.

 'allow alpha characters, spacebar and backspace key only
        If (e.KeyChar < "A" OrElse e.KeyChar > "z") _
            AndAlso e.KeyChar <> ControlChars.Back AndAlso Asc(e.KeyChar) <> Keys.Enter AndAlso Asc(e.KeyChar) <> Keys.Space Then
            'Display error message
            MessageBox.Show("Only alphabetic characters are allowed in this field.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Stop)
            txtLastname.Focus()
            e.Handled = True
        End If

I need to write something to allow the following keys only:

Alpha keys, "Enter" key, "Backspace" key, "period" key, "ampersand", "spacebar" key, "apostrope" key, and "hypen" key

I want to make sure I am doing this with manage code. Thanks for any assistance.

-Jeremy