Numeric Up Down Autosize not changing size

[Rzimmerman]

I'm a very low-level amateur - sorry if this is really basic (pun intended).

I have a numeric up down box that I wish to auto size the width, but autosize doesn't seem to do anything. Using VS Community. Here is some demonstration code of the problem (not the real code I'm using, but same behavior). The box just stays the same size. Shouldn't the box shrink and grow with the length of the number? Or am I misinterpreting what autosize does?

' ------- VB.net code -----------------
Public Class Form1
    Dim x As ULong
    Dim y As ULong
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load
        nubAutosize.AutoSize = True

    End Sub


    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        Application.DoEvents()
        nubAutosize.Value = 1
        For y = 1 To 100000
            Application.DoEvents()
        Next

        nubAutosize.Value = 10
        For y = 1 To 100000
            Application.DoEvents()
        Next

        nubAutosize.Value = 1000
        For y = 1 To 100000
            Application.DoEvents()

        Next

        nubAutosize.Value = 10000
        For y = 1 To 100000
            Application.DoEvents()

        Next

        nubAutosize.Value = 100000
        For y = 1 To 100000
            Application.DoEvents()

        Next

        nubAutosize.Value = 1000000
        For y = 1 To 100000
            Application.DoEvents()

        Next
        nubAutosize.Value = 10000000
        For y = 1 To 100000
            Application.DoEvents()

        Next

        nubAutosize.Value = 100000000
        For y = 1 To 100000
            Application.DoEvents()
        Next

        nubAutosize.Value = 1000000000
        For y = 1 To 100000
            Application.DoEvents()
        Next

        nubAutosize.Value = 10000000000
        For y = 1 To 100000
            Application.DoEvents()
        Next

        nubAutosize.Value = 100000000000
        For y = 1 To 100000
            Application.DoEvents()
        Next

        nubAutosize.Value = 1000000000000
        For y = 1 To 100000
            Application.DoEvents()
        Next


    End Sub


End Class