RegistryValues – PB Docs 2019

key

A string whose value is the key in the system registry for
which you want the values of its subkeys.

To uniquely identify a key, specify the list of parent
keys above it in the hierarchy, starting with the root key. The
keys in the list are separated by backslashes.

valuename

An array variable of strings in which you want to store
the names.

If the array is variable size, its upper bound will
reflect the number of named values found.

If the array is fixed size, it must be large enough to
hold all the names. However, there will be no way to know how
many names were actually found.