Need add-on user counter

My company offers an add-on for which I want to set the selling price to be based upon the number of Navision licensed users. Any suggestions on a simple way to programmatically accomplish this, or has someone already done it? It seems I should somehow be able to read the number of Navision licensed users and compare that number with a value I can encrypt in a table associated with the add-on, then allow the add-on codeunit to execute only if the customer has purchased enough add-on licenses. Thanks in advance for any advice. Wayne Brown President Soft Answers, Inc. 1-800-874-0539

This information is stored in table: 2000000040 License Information You can read the number of licensed sessions there. -md-