Tab control: write vertical text

[MrPike]

Hello, this is more of a general VB question.
I am creating a new AHMI project and I am using a standard tab control as a retractable menu docked to the right border of the main form and tab alignment set to "left". I have come to find out that changing the text color and alignment is not so simple and requires a custom 'Owner Draw Fixed" procedure.  I have the following code that does write the text vertical, however it is written "Top to Bottom".  I would like to write the text "bottom to top" as shown in the attached pic  Any one able to point me in the right direction?  Thanks

    '  Set the Alignment of the Text
     Dim sf As New StringFormat()
       sf.Alignment = StringAlignment.Center
     sf.LineAlignment = StringAlignment.Center
    sf.FormatFlags = StringFormatFlags.DirectionVertical

[Godra]

You can check the code of the rotating text button in this topic, to see if it might help:

https://www.advancedhmi.com/forum/index.php?topic=862.0

The rotation of the string is done inside the OnPaint sub (the angle is set inside the ButtonTextDirection property but could be set directly in the sub).