Randomize powerscript function

We have a client questioning our random numbers being generated.

We always use the powerbuilder Randomize(0) function.

then... Call Rand

They want to know, how many seed values that are available

How many different seeds can Randomize produce?

is it the size of the max int?

i read in the help that it's based on the system clock

is there further documentation / code on the Randomize function?

the version that we are using at that location is 12.1  (if that would make a difference)

Thanks