Programming Services under XP

I am trying to program a skeleton service (ie just a do nothing service) under XP. The code compiles and runs under 2000 & NT but not under XP.

I am using
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/services_1qjy.asp

as a reference. Every time I start the service under XP I get an Access Violation after I set the

SERVICE_TABLE_ENTRY DispatchTable[] =

any ideas would be most appreciated.

As mentioned the service will start under 2000 and NT.