Under the and the EU Copyright Directive , reverse engineering is permitted for achieving interoperability of independently created computer programs. More importantly, if you own the copyright or have a valid license to the executable (as your business does), you have the right to repair, maintain, and debug that software.
| Tool | Strengths | Weaknesses | Business License Cost | | :--- | :--- | :--- | :--- | | | Cheap, fast | No CLI, no commercial use, watermarked output | Not allowed | | ReFox (for FoxPro) | Excellent for FoxPro | Not VB | N/A | | OllyDbg / x64dbg | Free, powerful | Requires assembly skill, no form reconstruction | Free (but time-consuming) | | Outsourcing | Zero tool cost | Legal risk (exposing source), recurring expense | $5k-$50k per project | vb decompiler business license
This article dissects everything you need to know: features, legal compliance, pricing logic, and use-case scenarios for purchasing a multi-seat or enterprise license. VB Decompiler, developed by DotFix Software , is an advanced reverse engineering tool designed to restore source code from compiled Visual Basic applications (native code and p-code). Unlike a standard disassembler that shows you assembly language, VB Decompiler reconstructs forms, modules, class modules, and even event handlers in a human-readable format. Under the and the EU Copyright Directive ,
A: No. Microsoft's EULA explicitly forbids reverse engineering their runtime libraries. You may only decompile code you own or have explicit permission to modify. VB Decompiler, developed by DotFix Software , is
A: DotFix offers a limited demo that only shows the first 10 lines of each method. For a full evaluation, request a time-limited business trial (usually 14 days) via their sales team. Part 9: The Future – Is VB Decompiler Still Relevant? Microsoft ended extended support for VB6 in 2008. Yet, as of 2025, an estimated 3 million VB6 applications still run in enterprises. Why? Banks, hospitals, and railways cannot afford to rewrite mission-critical code.
Lost source code. A former developer who vanished without a trace. A critical bug halting payroll processing.