DrImpLib 1.0

DrImpLib is an Import Library Generator for Visual C++


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DrImpLib 1.0

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Manual

Overview

DrImpLib is an Import Library Generator for Visual C++ developed by Charles KWON.

It provides similar functionality to Borland C++’s implib tool, allowing developers to easily create import libraries (.lib files) from dynamic link libraries (.dll files) without the manual process of dumping exports and editing text files.

System Requirements


Microsoft Visual C++ development environment
Visual Studio Developer Command Prompt
Windows operating system

Basic Usage

drimplib [options] <dll_file> [lib_file]


Parameters

<dll_file>: Path to the DLL file from which to generate the import library
[lib_file]: (Optional) Output path for the generated import library file. If not specified, the library will be named after the DLL with a .lib extension


Version Information

Version: 1.0
Developer: Charles KWON (charleskwonohjun@gmail.com)
Copyright: 2025
Contact : For support or feedback, contact the developer at: charleskwonohjun@gmail.com


Examples

drimplib example.dll                 # Creates example.lib
drimplib example.dll mylib.lib       # Creates mylib.lib
drimplib -n example.dll mylib.lib    # Creates library without underscore prefix
drimplib -m x64 example.dll          # Creates 64-bit library


Command Line Options

  • -n: Don’t add underscore (_) prefix to function names
  • -m <arch>: Specify target architecture (x86, x64, arm64)
  • -k: Keep temporary files (DEF file)
  • -h, --help: Display help message

How It Works

DrImpLib follows these steps to create an import library:

  1. Extracts export information from the DLL using the dumpbin /exports command
  2. Parses the extracted information to identify exported functions
  3. Creates a DEF file containing the library name and list of exported functions
  4. Uses the Microsoft LIB tool to generate the import library from the DEF file
  5. Cleans up temporary files (unless the -k option is specified)

Important Notes

  • DrImpLib must be run from a Visual Studio Developer Command Prompt to ensure access to the required tools (dumpbin.exe and lib.exe)
  • By default, DrImpLib adds an underscore prefix to function names, which is consistent with certain calling conventions. Use the -n option to omit this prefix
  • The tool automatically filters out special functions like “*cgo*dummy_export”

Troubleshooting

  • Error: Unable to execute dumpbin command: Ensure you’re running the tool from a Visual Studio Developer Command Prompt
  • Error: No exported functions found: Verify that the DLL file contains exported functions
  • Error: Failed to create library: Check that the target directory is writable and that you have sufficient permissions

Contact

For support or feedback, contact the developer at: charleskwonohjun@gmail.com