# VB6 Native Code Decompiler and x86 Analysis

> Recover and analyze VB5/6 Native Code with decompiled and disassembled views, search, HEX inspection and step-by-step tracing. Inspect x86 disassembly free.

Canonical HTML: <https://www.vb-decompiler.org/vb6-native-code-decompiler.htm>

VB5/6 Native Code

## VB6 Native Code Decompiler and x86 Analysis Workspace

Native-compiled VB5/6 programs contain x86 machine code plus VB5/6 runtime patterns and project metadata. Effective analysis needs readable reconstruction and the ability to verify every conclusion against disassembly, addresses, registers, stack state, and raw bytes.

[Inspect Native Code free](https://www.vb-decompiler.org/download.htm)[Read the Native Code guide](https://www.vb-decompiler.org/vb60_reversing.htm)

### One binary, several synchronized views

#### Decompiled view

Reconstructed expressions and VB-aware operations help explain what a procedure does.

#### Disassembly

x86 instructions, addresses, and calls let the analyst verify low-level behavior.

#### HEX editor

The current code addresses can be inspected and patched in their binary context.

#### Step-by-step tracer

Emulation exposes CPU and FPU registers, stack, variables, and state without relying only on static guesses.

![Full-size VB Decompiler Native Code recovery comparison showing improved reconstructed code](https://www.vb-decompiler.org/image/vb_decompiler_262/vb_decompiler_262_branch_snapshot.png)A full-size Native Code example shows how recovered variables and VB5/6 operations become more useful as analysis improves.

### What the editions provide

| Task | Lite | Licensed editions |
| --- | --- | --- |
| Open supported VB5/6 Native Code files | Yes | Yes |
| View native x86 disassembly | Yes | Yes |
| Recover high-level code | No | Depending on edition |
| Advanced tracing, analytics, and editing tools | No | See Detailed Features |

**Recovery boundary:** VB Decompiler can recover up to 80% of code from a typical supported, non-obfuscated VB5/6 Native Code application. Compilation and optimization flatten expressions, reuse registers and stack slots, inline operations, and remove source names and types. The result normally cannot be recompiled immediately: remaining decompiler incompatibilities and issues must be investigated and corrected manually.

### Use AI Helper after static decompilation

The built-in [AI Helper](https://www.vb-decompiler.org/help/ai_code_enhancement.htm) can process selected recovered code through prepared prompts using either a local offline model or the OpenAI API. It can suggest clearer structures and names and help explain difficult fragments, while the analyst verifies those suggestions against x86 disassembly, tracing results, raw data, and surrounding VB5/6 procedures.

### How to approach a large native project

1. Identify the form, event, API, string, or address connected to the behavior you need.

2. Use search and references to narrow the project before reading routines.

3. Compare decompiled and disassembled views; inspect raw bytes when an address or operand needs confirmation.

4. Trace difficult paths step by step and record inferred variable and function roles.

5. Rename symbols and optionally use AI Helper to improve selected decompiled code, then validate the reconstructed logic.

### Continue by task

#### Recover a project code

[Use the recovery sequence](https://www.vb-decompiler.org/recover-vb6-source-code.htm)

#### Analyze forms and FRX

[Recover interface resources](https://www.vb-decompiler.org/vb6-form-resource-extractor.htm)

#### Compare editions

[See exact licensed features](https://www.vb-decompiler.org/order.htm#detailed-features)

### Start with free native disassembly

Lite lets you open the file and inspect native x86 disassembly before deciding which high-level recovery and analysis features you need.

[Download VB Decompiler Lite](https://www.vb-decompiler.org/download.htm)