A detailed crystal report in vc api example

My Techyv Friends;

I had googled so many times but I cannot find crystal report in vc api example.  I am so confused with what is said in the page I had browsed several times.  I am searching this because I wanted to know how to eliminate network traffic and enable the system to run fast and smooth in any network. API through internet is the best solution for this.  But my problem is I don't understand the crystal report fully.  Please help me find the correct connection for crystal report in vc api example. A comprehensive report that someone could understand the terms. Perhaps a video that would explain me about this crystal report in api.  I would be delighted to hear from you soon.