Program:-

Public Class slip3

    Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick

        Label1.Left = Label1.Left + 10

        If Label1.Left >= Me.Right Then

            Label1.Left = Me.Left

        End If

    End Sub

End Class

Design:- 

1) Take  Label and timer control on design form.

2) Set Label Text 

3) Set timer control Enabled property as True

Note - Set startup form's application type as Windows Form Application

Output:-