Rajesh Kumar, research and research and research. You will get your answers. A lawyer's services are also essential: just don't hire a money-minded advocate like S. gangadhar gowda. If u can escape the greedy and shameless advocates like him, an honest advocate will polish your schemes and thus, an honest advocate will be essential. The money you will pay him will be worth it. But again, research and research. Internet is a tool which a lot of geniuses did not have and do not have. You have this tool: make it handy.