The system variables _PKSER, ONLINEUSERID and ONLINEUSERNAME can be used to determine the user license mode used by the product.
- If _PKSER doesn't equal "000-00000000", then the user is using a perpetual license.
- If _PKSER equals "000-00000000" and both ONLINEUSERID and ONLINEUSERNAME don't equal "", then the user is on subscription.