Obfuscation is one way, but it can\'t protect from breaking the piracy protection security of the application. How do I make sure that the application is not tampered with,
If Microsoft could come up with a solution, we will not have pirated Windows versions, so nothing is very secure. Here are some similar questions from Stack Overflow and you can implement your own way of protecting them. If you are releasing different versions then you can adopt different techniques for different version so by the time first one is cracked the second one can take over.
Managing features on a license basis for a C++ application
Secure a DLL file with a license file
Licensing / protection software?