Convert HLP to HPJ

Understanding HLP and HPJ file formats

HLP files are legacy Windows Help files, commonly used in older Windows applications to provide user assistance. These files contain compiled help documentation, including text, images, and navigation elements. HPJ files, on the other hand, are Help Project files used as source files for creating HLP files. An HPJ file contains project settings, file references, and configuration details required by the Microsoft Help Workshop to compile a HLP file.

Why convert HLP to HPJ?

Converting a HLP file back to a HPJ file is typically done to edit or update the help documentation. Since HLP files are compiled, you need the original HPJ and related source files to make changes. If the HPJ is lost, decompiling the HLP file is necessary to recover the editable project files.

How to convert HLP to HPJ

Direct conversion from HLP to HPJ is not natively supported by Windows, but you can decompile HLP files using specialized tools. The most reliable method is to use the Microsoft Help Workshop or third-party utilities designed for decompiling help files.

Recommended software for HLP to HPJ conversion

• HelpDeco: A popular open-source tool that can decompile HLP files, extracting the HPJ project file and all associated RTF and bitmap files. It works via command line and is compatible with most Windows versions.
• Microsoft Help Workshop: While primarily used for compiling, it also includes tools for decompiling HLP files. However, HelpDeco is generally more effective for this purpose.

Step-by-step conversion using HelpDeco

1. Download and install HelpDeco from a trusted source.
2. Open a command prompt and navigate to the folder containing your HLP file.
3. Run the command: helpdeco yourfile.hlp
4. HelpDeco will extract the HPJ file, along with all source files, into the current directory.
5. You can now open the HPJ file in Microsoft Help Workshop for editing or recompiling.

Tips and considerations

• Some formatting or links may not be perfectly preserved during decompilation; manual adjustments may be needed.
• Always keep backups of your original HLP files before attempting conversion.
• For modern help systems, consider converting your help content to newer formats like CHM or HTML Help.