The product key system for (released in 1998) is a relic of pre-internet activation era software, characterized by simple 10-digit IDs rather than the complex 25-character encrypted strings used in modern Microsoft Visual Studio versions. The 10-Digit ID Structure

A standard VB6 product key format looks like this:

– Someone found an old box in their basement and is selling it for $200–$500. This is legal (resale of physical media is permitted under the first-sale doctrine), but is it practical? Not really.

Unlike modern software that requires online activation, VB6 used a simpler "Product ID" system. During installation, you will typically be prompted for a 10-digit code (Standard/Professional) or a 20-digit code for Enterprise editions.

PowerBASIC was a popular alternative for performance-critical VB6 code. It compiles to tiny, fast executables. However, the company is defunct, so this is not a long-term solution.