Microsoft Software Licensing and Protection Services (SLP Services) is a development platform that offers developers a license activation and management framework to build protected applications written in managed and native code.
Adding a product, designing a feature set, and issuing a perpetual license in the Microsoft SLP Online Service are among the first steps in protecting intellectual property and enforcing licensing policies. Microsoft Software Licensing and Protection (SLP) Services offer software vendors a variety of licensing models with which to protect their applications.
http://msdn.microsoft.com/en-us/slps
Home