Regions in JASS

Using the Region patlette, I've created a region, and (for the purposes of this question) named it a.

Now then, if I want to refer to Region a in JASS, what would it be called?

I'm pretty sure its a UDG (User Defined global), but I'm not so sure, and I'm sick of guess and checking.

Can someone please help?

Thanks in advance.

EDIT: I found it out by using convert to custom text... it turns into gg_rct_RegionName

in jass, regions are called rect / return as rect where region are something else, a group of location points if im not mistaken

Yeah, converting it to custom text is like the answer to many things, make sure you do that before asking help next time :D