Public Class MyClass

    Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        forLoop()
    End Sub

    Private Sub forLoop()
        For i = 0 To 10 Step 1
            SendKeys.Send(TextBox1.Text)
            SendKeys.Send("{ENTER}")
        Next i
    End Sub

End Class