I'm using the UltraListView in Icon-View. For every Item i'm assigning an image. These images are 512x512 pixels in size.

By default, the user sees the ListView with a smaller imagesize like 80x80 for example. He can then move a slider on the form to resize the images from 16x16 up to 512x512.

This resizing is done via (lvBrowser is the UltraListView in IconView-Mode):

            this.lvBrowser.ViewSettingsIcons.ImageSize = new Size(ultraTrackBar1.Value, ultraTrackBar1.Value);

This works great but with one problem:

At some point the Icons are too big to fit on the screen inside the ListView - so normally i would expect to get a vertical Scrollbar automatically, but this doesn't work. No Scrollbar appears!

The Scrollbar appears after i resize the form a little bit (the ListView is dock=fill on a panel which can be resized by resizing the form or moving a slider). This little resize makes the ListView showing it's scrollbar - but that's not a solution, right? :)

I've tried: lvBrowser.Update(); and .Refresh() and .Invalidate() with no success.

Thanks a lot