Yep, tried that. I think this is a memory issue as it works on a *clean* form on my PC but not within the application. Although the navigation menu for the system is also a treeview. The PC I use here dies at least once a day so I know there are problems with it.
Thanks anyway,
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>I notice you haven't gotten any answers on this (and this is a second posting?). Have you figured anyhting out?
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>Just a simple idea, have you tried toggleing the _vfp.AutoYield property?