menerapkan string.uase , strings.lcase,strconv dan strings.strreverse pada program vb

berikut list code nya........................

Private Sub btnkapital_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnkapital.Click
        lblhasil.Text = Strings.UCase(txtkata.Text)
    End Sub

    Private Sub btnbiasa_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnbiasa.Click
        lblhasil.Text = Strings.LCase(txtkata.Text)
    End Sub

    Private Sub btnawalan_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnawalan.Click
        lblhasil.Text = StrConv(txtkata.Text, VbStrConv.ProperCase)
    End Sub

    Private Sub btnterbalik_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnterbalik.Click
        lblhasil.Text = Strings.StrReverse(txtkata.Text)
    End Sub