How to get value by reference from WIN32OLE::ARGV?

Question

Below code returns 0

v = 0
obj.foo('',0)
printf("v : %d \n",  WIN32OLE::ARGV[1])

when really it must return another value by reference.

For example in python it works like here:

v = obj.foo('')
print('v : %d' % v)

I don't get yet how to make same on Ruby.