Win32 API to enumerate dll export functions?

by

dumpbin /exports is pretty much what you want, but that’s a developer tool, not a Win32 API.

LoadLibraryEx with DONT_RESOLVE_DLL_REFERENCES is heavily cautioned against, but happens to be useful for this particular case – it does the heavy lifting of mapping the DLL into memory (but you don’t actually need or want to use anything from the library), which makes it trivial for you to read the header: the module handle returned by LoadLibraryEx points right at it.

#include <winnt.h>
HMODULE lib = LoadLibraryEx("library.dll", NULL, DONT_RESOLVE_DLL_REFERENCES);
assert(((PIMAGE_DOS_HEADER)lib)->e_magic == IMAGE_DOS_SIGNATURE);
PIMAGE_NT_HEADERS header = (PIMAGE_NT_HEADERS)((BYTE *)lib + ((PIMAGE_DOS_HEADER)lib)->e_lfanew);
assert(header->Signature == IMAGE_NT_SIGNATURE);
assert(header->OptionalHeader.NumberOfRvaAndSizes > 0);
PIMAGE_EXPORT_DIRECTORY exports = (PIMAGE_EXPORT_DIRECTORY)((BYTE *)lib + header->
    OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress);
assert(exports->AddressOfNames != 0);
BYTE** names = (BYTE**)((int)lib + exports->AddressOfNames);
for (int i = 0; i < exports->NumberOfNames; i++)
    printf("Export: %s\n", (BYTE *)lib + (int)names[i]);

Totally untested, but I think it’s more or less correct. (Famous last words.)

More Related Contents:

  1. How to get main window handle from process id?
  2. How do I programmatically get the version of a DLL or EXE file?
  3. How to read a value from the Windows registry
  4. How do I call ::CreateProcess in c++ to launch a Windows executable?
  5. Exporting a C++ class from a DLL
  6. Detecting Windows 10 version
  7. Win32 programming hiding console window
  8. Sharing a global/static variable between a process and DLL
  9. know if .lib is static or import
  10. DLL redirection using manifests
  11. updating a string table with UpdateResource
  12. Is there a way to find all the functions exposed by a dll
  13. Read process memory of a process does not return everything
  14. How can I get the path of a Windows “special folder” for a specific user?
  15. How do I get the window handle of the desktop?
  16. How do I implement dragging a window using its client area?
  17. C++ Executing CMD Commands
  18. WinAPI Sleep() function call sleeps for longer than expected
  19. Check the file-size without opening file in C++?
  20. What’s the differences between .dll , .lib, .h files?
  21. Win32: How to hide 3rd party windows in taskbar by hWnd
  22. EnumDisplayDevices vs WMI Win32_DesktopMonitor, how to detect active monitors?
  23. Windows & C++: extern & __declspec(dllimport)
  24. Is rebasing DLLs (or providing an appropriate default load address) worth the trouble?
  25. Name of process for active window in Windows 8/10
  26. Passing reference to STL vector over dll boundary
  27. How to get the Executable name of a window
  28. Getting another process command line in Windows
  29. Visual Studio 2013: CL.exe exited with code -1073741515
  30. C++: What’s the simplest way to read and write BMP files using C++ on Windows?

Leave a Comment