Hi, The constant hiding of the horizontal (ListView & TreeView) and vertical (TreeView) makes the interaction with the control very noisy because the viewport size always changes e.g. when expanding & collapsing and or e.g. scrolling a list with cells of different sizes.
The native UI-Toolkits (at least OS-X and IIRC) don't do this and always reserve a scrollbar area which makes interacting with the control IMHO a lot better. I looked into VirtualFlow to see if I could hack myself (via reflection) into it and make the scrollbars show up all time but unless I've looked at the wrong places I could not find anything I could do. Am I right? What do others think? Tom -- Thomas Schindl, CTO BestSolution.at EDV Systemhaus GmbH Eduard-Bodem-Gasse 5-7, A-6020 Innsbruck http://www.bestsolution.at/ Reg. Nr. FN 222302s am Firmenbuchgericht Innsbruck