Whitepaper discussing DLL injection on Windows Vista (32bit). Includes an executable for injecting a DLL in a process of your choice and the original source code is in the pdf.
You can download it from the following link: https://packetstormsecurity.com/files/download/74287/DLL_Injection_In_Vista.tgz
Source: https://packetstormsecurity.com/files/74287/Whitepaper-Win-Vista-DLL-Injection-32bit.html