For native-compiled VB applications, the NSA's Ghidra is a free, open-source reverse engineering framework. It has a steep learning curve, but with the VB plugin extensions available on GitHub, it can analyze VB runtime structures effectively.
VBReFormer is a free tool specifically designed for VB6 and VB5. While the "Pro" version costs money, the Community Edition is genuinely free and legal. It recovers forms, code modules, and P-Code efficiently. It lacks the advanced debugger of the Pro version, but for recovering lost source code, it is excellent. vb decompiler pro free
Some "cracks" act as a dropper for ransomware. They sit dormant for weeks, then encrypt all your .vb, .sln, and .docx files. Since you obtained the decompiler illegally, you cannot call tech support for help. You are forced to either lose your data or pay the ransom. For native-compiled VB applications, the NSA's Ghidra is