APIHijack - A Library for Easy DLL Function Hooking

This code is intended to be included in a DLL inserted through a global Windows Hook (CBT hook for example). It will replace functions from other DLLs (e.g. DDRAW.DLL) with functions from your DLL.

Functions are hooked by passing a parameter structure to the HookAPICalls() function as follows: Click here to see the code.

Now all that remains is to get your DLL loaded into the target process. The MSDN has a few good articles on Windows hooks, which are the preferred way to get an arbitrary DLL loaded into a process:

http://msdn.microsoft.com/library/techart/msdn_hooks32.htm

Also, the article from which this code is based shows another way to do it, which involves loading the process to be hooked as a debug target:

http://msdn.microsoft.com/library/periodic/period00/hood0200.htm

Downloads

Download source code - 4 Kb

This article was originally published on September 4, 2000