Hmm At first sight I can only see two Windows 2000 incompatible API calls being used (building version 3.08.2720.27901 in VS.NET under Windows 2000 SP4):
GetLayeredWindowAttributes (user32.dll)
and
WTSRegisterSessionNotification (wtsapi32.dll)
Both which are perfectly avoidable because the opacity function seems to be used rudimentairy in SetFormOpacity and the fast user switching function in "EventHandler SessionChanged" is bollocks in windows 2000 anyhow because it doesn't -have- fast user switching.
Mind these are the only two problems I found in playing around Paint.NET for a few minutes (to edit a PNG icon which I couldn't do with MS Paint) but if this is the scope of "Windows 2000 incompatibility" then .... WHY?
