Thanks Rick. I think this is the finally the reason I've needed to move to SQL server.

>That can't be done, because there's no 'master' controller that has instances for all of them.
>
>You can maybe play around with COM+ and see if you can put a whole COM+ application on hold, but that's not a good idea and a kludge at best.
>
>I don't see any reason why this should happen either. With VFP data yeah, there's a big problem with the EXCLUSIVE requirement for files but with SQL Server no such issues.
>
>+++ Rick ---
>
>>Can I unload COM DLLs and EXEs from memory using ASP.NET?
>>
>>I would like to remove my biztier DLL and reporting EXE from IIS memory before running a month-end routine on the server. I could use IISRESET at the command prompt on the server, but I will be using a shared server and don't want to disturb apps outside of my virtual directory.