I use oScript.GetCurrentProcedure() to return current event / procedure. Note for column events it's separated with _ char. So it returns these values:

PreTotals, PreWrite, PostRead, PreDelete, PostDelete, SetDefaultValues, ScriptInit
PostValidation_ItemCode
PostValidation_UDF_KevRocks1
PretValidation_UDF_KevRocks2

ALSO, if you look at the business obj VBS file that's how you know what it exactly returns (how I fumbled over that it's PostValidation_Blah and PreValidation_Blah as opposed to PostValidate_Blah and PreValidate_Blah)

ALSO, when checking it could be for helpful for comparison to UCase or LCase.
e.g. If UCase(oScript.GetCurrentProcedure()) = "PRETOTALS" 

For other stuff if you do the OBJ trick and look at Sy_Script you'll see stuff that could be usable:

* RefCount could be helpful. Use it on some DebugPrint's to see what it does. 
* UIObj (under Properties / Numeric is very helpful. If not 0 it means you can do UI scripting on it. IOW when you're checking to see if you're in a UI it's oSession.UI but to see if you can also use oUIObj stuff on it, check for both:
If oSession.UI and oScript.UIObj Then go fish

As always your answers and insights are excellent Alnoor.  Thanks!

oScript.GetCurrentProcedure() is much better for what I am trying to achieve.

(I'll be sure to take a look at RefCount / oScript.UIObj too).