I am trying to understand the REGISTRY.VCX in VFP 6.

The registry.vcx has these procedure

procedure loadregfuncs
procedure openkey
procedure getkeyvalues
procedure setkeyvalues
.
.
.etc


lo = crea("registry")
lo.openkey(cloookupKey,nregKey,lCreateKey)

I am trying to understand what are the three parms for ?
what are the three parms should be???

cLookUpKey = ???
nRegKey = ???
lCreateKey = ???/


How do I know which registry I am dealing with ???

Thanks