> I haven't seen this so far and was wondering about the "*".
> [ gnF2Edits, gnF2Posts ] are enumerations of TIB_Grid_NavOptionType,
> FNavigateOptions is a set of TIB_Grid_NavOptionType.
> So what does the "*" do?

These are set operations. What the * does here is do a check of what is the
same in each set being compared.
The result will be an empty set [ ] if the two sets don't share any common
elements.
This code is simply checking whether or not one of two settings are in the
set property.

Regards,
Jason Wharton
CPS - Mesa AZ
http://www.ibobjects.com