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VB Decompiler
VB Decompiler is decompiler for programs (EXE, DLL or OCX) written in Visual Basic 5.0 and 6.0. As you know, programs in Visual Basic can be compiled into interpreted p-code or into native code.
Since p-code consists of high-level commands, there is a real possibility to decompile it into the source code (of course, the names of variables and some functions will not be decompiled). VB Decompiler restores source code from p-code as much as possible precisely. And after some modifications you may try to compile generated code.
P-Code Example
If a program was compiled into the native code, restoring full source code from machine instructions is not possible. But VB decompiler can help to analyze the program even in this situation as well. It contains a powerful disassembler and emulator. This powerfull engine try to decode most assembler instructions to most likely VB commands. Of course, it fails on some optimizations of assembler code and sometimes generate not correct instructions. But at this time this is a best way to analyze native code applications.
Native Code Example
In general, VB Decompiler is an ideal tool for analyzing programs and it is perfect if you lose the source code and need to partially restore the project.
VB Decompiler has 2 different versions: Lite and Pro
| Features of VB Decompiler | Lite | Pro |
| Universal unpacking for packed applications (supported UPX, NSPack and more other popular EXE packers) |  | |
| Decompiling forms (frm and frx) and usercontrols (ctl) object
files | | |
| Fully p-code decompiling (with parsing opcodes to standart vb instructions, with decompile GUID objects) |  | |
| 2 p-code decompiling modes (with stack parsing or without stack parsing) | | |
| Disassembling native code procedures (with power Pentium Pro disassembler, supporting MMX and FPU instruction sets) | | |
| Disassembling native code procedures with String References and API Calls (with power Pentium Pro disassembler, supporting MMX and FPU instruction sets) | | |
| Partially decompiling native code (using code emulation engine) | | |
| Syntax coloring in decompiled code | | |
| String reference list and search engine | | |
| Fast decompiling speed | | |
| Obfuscator for VB5/6 programs | | |
| Patcher for VB5/6 programs | | |
| Save decompiled data to single DB file | | |
Price |  |  |
Minimum System Requirements: Pentium 166, 32Mb RAM, Windows 95/98/ME/2k/XP/2003/Vista/2008
Screenshots of VB Decompiler Pro:
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