Private Sub txtCaptcha_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles txtCaptcha.KeyDown
        Select Case e.KeyCode
            Case Keys.F5 'Reload the captcha
                ReloadCaptcha(sender, e)
            Case Keys.Enter
                ValidateCaptcha(sender, e)
        End Select
    End Sub