Please see my article: http://tilakmarg.com/answers/difference-between-a-criminal-complaint-filed-under-section-200-and-190-of-cr-p-c/
If you have sufficient evidence to prove the case on your own as a private complaint case, then you may try Section 190 / 200 Cr.P.C. private complaint route.
However, if you feel that you need police investigation for collecting relevant evidence and that you’ll not be able to prove the case yourself without such additional evidence, in that case, you may try an application under Section 156(3) Cr.P.C. requesting the Magistrate court to direct police to investigate the case.
Dr. Ashok Dhamija is a New Delhi based Supreme Court Advocate and author of law books. Read more about him by clicking here. List of his Forum Replies. List of his other articles. List of his Quora Answers. List of his YouTube Videos.