References are available online for SOLO Server result codes and client-side result codes.
The latest API references and manuals are available online, and you may use the links below to go to or bookmark them:
When you install Protection PLUS 5 .NET Edition on a computer, the PLUSManaged API reference is installed on your computer, and can be found in your start menu, under SoftwareKey Licensing System/Protection PLUS 5 .NET Edition/PLUSManaged API Reference.