Vb.net cannot change Datagridview column index

I am trying to increase the width of a last dummy column in a datagridview so that I display certain rows after a button click.
The DGV is bigger that the screen so it scrolls, also the forth column is frozen.

I am using the following code :

Code:

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Private Sub ButtonHierdieWeek_Click(sender As Object, e As EventArgs) Handles ButtonHierdieWeek.Click
        Dim BufferKolomWydte As Integer = 0
        For i As Integer = 23 To 32 Step 1
            SkeduleringDataGridView.Columns(i).Visible = False
            BufferKolomWydte = BufferKolomWydte + SkeduleringDataGridView.Columns(i).Width

        Next
        BufferKolomWydte = BufferKolomWydte + SkeduleringDataGridView.Columns(12).Width + SkeduleringDataGridView.Columns(13).Width


        SkeduleringDataGridView.FirstDisplayedScrollingColumnIndex = 15
        SkeduleringDataGridView.Columns(33).AutoSizeMode = DataGridViewAutoSizeColumnMode.NotSet
        SkeduleringDataGridView.Columns(33).Width = BufferKolomWydte

End Sub

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However the column width does not change. I have set the DataGridViewAutoSizeColumnMode to NotSet above.
Is there another setting that I am missing?

Hi Gideon,

This might help.

You might like to note that

Code:

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For i As Integer = 23 To 32 Step 1

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can be written as

Code:

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For i = 23 To 32

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The index will always be an integer and the step is 1 by default so is only needed if the step is to be something other than 1, (-1, 2, 5 etc.)

Poppa