How to make scroll buttons visible all the time on WinForms TabControlAdv in single line mode?

//Sets the TabControlAdv in single line mode.
this.tabControlAdv1.Multiline = false;
public class TabControlExt : TabControlAdv
{
    public TabControlExt()
    {
        //Initializes the TabControl.
    }
    protected override void AdjustScrollButtonDimensions(ref RectangleF tabPanelBounds, bool scrollNeeded)
    {
        // Init the scrollbuttons used to scroll the tabs, when not already inited.
        if (this.ScrollButtons == null && !this.Multiline)
            InitScrollButtons();
        // Needs the second argument to enable in order to show the scroll button.
        base.AdjustScrollButtonDimensions(ref tabPanelBounds, true);
    }
}

Public Class TabControlExt
    Inherits TabControlAdv
    Public Sub New()
        'Initializes the TabControl.
    End Sub
    Protected Overrides Sub AdjustScrollButtonDimensions(ByRef tabPanelBounds As RectangleF, ByVal scrollNeeded As Boolean)
        'Init the scrollbuttons used to scroll the tabs, when not already inited.
        If Me.ScrollButtons Is Nothing AndAlso (Not Me.Multiline) Then
            InitScrollButtons()
        End If
        'Needs the second argument to enable in order to show the scroll button.
        MyBase.AdjustScrollButtonDimensions(tabPanelBounds, True)
    End Sub
End Class