http://www.codeproject.com/KB/threads/winspy.aspx
Three Ways to Inject Your Code into Another Process
http://www.codeproject.com/KB/system/hooksys.aspx
API hooking revealed
http://www.codeproject.com/KB/DLL/XDllPt1.aspx
Step by Step: Calling C++ DLLs from VC++ and VB - Part 1
http://www.codeproject.com/KB/winsdk/CodeInject.aspx
Portable Executable (P.E.) Code Injection: Injecting an Entire C Compiled Application
http://www.codeproject.com/KB/system/inject2it.aspx
Injective Code inside Import Table
http://www.codeproject.com/KB/system/inject2exe.aspx
Inject your code to a Portable Executable file
http://www.codeproject.com/KB/threads/APIHooking.aspx
API Hooking (LoadLibrary)