DLL injection under Vista

Need DLL injection under Vista that works for service to user level ## Deliverables I can do under Vista DLL injection using CreateRemoteThread from Service to Service or from user app to user app but because of Vista integrity level I couldn't perform injection from my Service to app level. I tried to create the remote thread with lower security but it didn't work, so I need a piece of code that allows me to do injection from service to user level and using only legit API, without any hacks. Solution must be compiled on VS6 or VS2005