Embedding Window into another process without SetParent() and FindWindow()

Hello. I am expert in Windows API, meantime there is way to inject code into another process, but it;s little unclear what you mean "without SetParent() and FindWindow()"? Do you want to put code into service? or? Thanks

Hello, I'ma Windows engineer specialising in C and C++.. I can tell you that, even if this is possible, it would require very low-level techniques (process injeciton etc), and wouldn't be guaranteed to work on modern flavours of Windows(which have security built in , to prevent exactly THIS kind of process intrusion). Just thought I would share that with you. Best wishes