>>Tried using SetServiceStatus instead but get exactly the same problem.
>>Both calls to SetServiceStatus() appear to work OK (return true and no error code) but the check on acceptedCommands still shows 5 and the OnCustomCommand method doesn't get hit on shutdown :-{
>>Maybe I'm missing something about how this is supposed to work .......
>
>Yes, that is correct. This is what it does by default. But, it was good to have tried to manually override its behavior. I am starting to wonder if the fact that there is a mention that this does not apply to Windows Server 2003 might be the same for Windows 7. As for me, I haven't had time to request new server infrastructure to be able to test that on Windows Server 2008.

Well SERVICE_ACCEPT_PRESHUTDOWN was introduced in Vista. Where did you read that it wasn't part of WS2003 ? IAC, I'm sure they wouldn't have removed it for WIN7. I'm just missing something :-{