DLL - How do I identify the task calling it ?

[Hawkwind]

New to writing DLLs.... succesfully written a simple DLL but need to identify the task which is calling the DLL so that I can keep a table of data in the DLL specific to that task.
There's got to be a simple way to do this, I'm using VISTA, not XP.
Thanks

[Nick]

GetProcessName() (http://msdn2.microsoft.com/en-us/library/aa713349(VS.71).aspx)

[Hawkwind]

Thanks, I'll try it out later.