>John, > >>In the good old days, I ran into similar limitations with the VCL >>library in Delphi. I added support for virtual ListView / TreeView >>controls by hacking my way into the library (the extensibility points in >>the framework didn't let me add this functionality cleanly via >>derivation). >> >>Has anyone else gone down this path already? > > >Yeah, I've done this in the past. Making a virtual ListView by simply deriving from >ListView and setting the LVS_OWNERDATA style caused lots of unexpected problems. The >control is apparently not written to handle that. So I ended up deriving directly >from Control and implementing the whole thing from scratch instead.
John, Mattias, Hummmm.... I have an implementation derived directly from the listview that is working just fine. There are a few 'gotchas' but nothing that can't be worked around without too much trouble. The problems I've encountered mostly have to do with anything that lets the listview think it has items of it's own in it's items collection. As long as you keep the items collection out of play and deal with items on an API level, all seems to be well. Bryan _________________________________________________________ New Vision Software "When the going gets weird," Bryan Stafford "the weird turn pro." [EMAIL PROTECTED] Hunter S. Thompson - www.mvps.org/vbvision Fear and Loathing in LasVegas You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
