>Repeated same task by launching VFP using "run as administrator" -- no hang occurs, with DLL, TLB and VBR being generated.

Seems to try to write to the registry before creating the dll, and you need this elevator for that, at least for some machine-related areas of the registry.

>Did notice something interesting. If I go to the Compatibility tab of the shortcut where I'm launching VFP 6.0 (SP5), and select "Run the program in compatibility mode for" and select XP SP3, then it seems to work -- the DLL is being generated as before. The one downside is that EVERY time I launch VFP (through the shortcut), I get a UAC warning dialog.

I had the same nuisance on two machines, but now only on one, which I use less frequently. Perhaps it gives up the dialog after 127 times?