Opening vbp Visual Basic Project

If you have an MSDN subscription, then VB6 is available as a free download. Otherwise try ebay like Alex suggests, but it usually costs significantly more than $5.

vbp is indeed a VB 5/6 Project File.

VS6/VB5/VB6 are not free, so if you want to build the project you will need to spend $5 on ebay.

The VB5 Control Creation Edition (build COM components only) was the only free version MS released.

Older versions of VS.net included a way to import a VBP and upgrade it to VB.NET, but YMMV (significantly).

Edit; If you just want to look at the source/project structure all the files except .frx are plain ascii.