Dim tb As New TextBox
tb.TextAlign = HorizontalAlignment.Center

Class MyTabPage : Inherits TabPage
    ' DEINE ZUSÄTZLICHEN NEUEN METHODEN
    Public Shadows Property Text() As String
        Get
            Return MyBase.Text.Trim
        End Get
        Set(ByVal Value As String)
            MyBase.Text = Value
        End Set
    End Property
 
    Public WriteOnly Property TextAlignment() As _
      System.Windows.Forms.HorizontalAlignment
        Set(ByVal Value As System.Windows.Forms.HorizontalAlignment)
            Dim s As String = Me.Text
            Select Case Value
                Case HorizontalAlignment.Center
                    MyBase.Text = Space(10) & s & Space(10)
                Case HorizontalAlignment.Right
                    MyBase.Text = Space(10) & s
                Case HorizontalAlignment.Left
                    MyBase.Text = s
            End Select
        End Set
    End Property
End Class

  Dim tc As New TabControl
        Dim tp As New MyTabPage
        tp.Text = "HALLO"
        tp.TextAlignment = HorizontalAlignment.Center
        tc.TabPages.Add(tp)
        Me.Controls.Add(tc)