How to I create a scatter plot using qwt?

I am developing a program that solves a differential equation which predicts how a metal will cool. I created an interface for all of the input but, I don't know how to create a scatter plot on the screen itself. I have a very nice looking qwt scatter plot on the web site(http://qwt.sourceforge.net/scatterscreenshots.html) but, I have no idea where to start create something like that or how to get started using qwt. I think I may have install qwt but, am unsure. Could help me to create this scatter plot for my program?

Thank you,

You should post all qwt related questions in the qwt sub-thread.
By the way, your requirement is very common. Refer this thread. Must be innumerable other threads on the topic.