CodeProject

• Three Ways to Inject Your Code into Another Process [Jul 2003]
• API Hooking with MS Detours [Oct 2008]
  • Intercept and Rewrite DNS Requests Using Regular Expressions [Nov 2006]
  • EasyHook - The reinvention of Windows API hooking [Aug 2008]
  • Circumventing Windows Group Policies using Detours [Apr 2004]
  • Trap CtrlAltDel; Hide Application in Task List on Win2000/XP [Apr 2003]
  • Symbolic Links for Applications using Detours [May 2007]
  • Low Fragmentation Heap and Function Interception [Jan 2004]
  • How to get rid of Microsoft Detours’ detoured.dll
  • more code examples (Google Code Search)
    • simpler code examples
  • more code examples (Google)
• system-wide hooks
  • AppInit_DLLs
    • basic documentation (it's comma or space delimited)
    • In Vista, it's essentially been replaced by LoadAppInit_DLLs, and requires admin-level access to modify
    • GPCul8r - Group Policy Bypassing Tool
      fuck, that's easy
    • Hot code patching
  • SetWindowsHookEx() + "innocuous" message
    • "innocuous" = WH_CBT (search for "The SetWindowsHookEx method")
• subclassing
  • hide task manager
  • extend task manager
  • cross-process subclassing / Notepad
  • more
• A More Complete DLL Injection Solution Using CreateRemoteThread [Aug 2007]
• Powerful x86/x64 Mini Hook-Engine [Nov 2007]
• API Hooking (LoadLibrary) [Jun 2009]
• HookAPI source code [Jan 2005]
• DLL Injection and function interception tutorial [Oct 2003]
• API hooking revealed [Dec 2002]
• Remote Code/Process Injection and Relocation [Sep 2009]
• Extending Task Manager with DLL Injection [May 2005]
• RemoteLib - DLL Injection for Win9x & NT Platforms [Jan 2005]
• APIHijack - A Library for easy DLL function hooking. [Sep 2000] (all the documentation is in Chinese)

other places

• API Hooking Revealed