title: How to run this form in QTCreator?
body: <p>I am following 'C++ GUI programming with QT 2ndEd'. I design a form using QTCreator 'Widget' template and save it as form.ui in a directory. Then I write main.cpp file in same directory. The 'Run' option is not enable still. The book says to run qmake to create .pro file and a makefile. How I do that.    </p>