>>Well, the only intrusive place are (1) the program icon, fixable when compiling your application, and (2) MESSAGEBOX(), which can (and often should) be replaced by another tool. Using non-default file extensions other than .FPT is not difficult at all.
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>Right, but I've seen a shrinkwrapped VFP app that must have had a wierd ON SHUTDOWN, because every so often I would get the "VFP cannot quit" or whatever.

I've seen this too in a shrinkwrapped app- and there are certain errors that can't be trapped that say VFP on them as well.