How to make an INSTALLER for QT application

Hi,

I have developed an application; but it runs only when I run it within the Qt Creator. In other words, it is not run directly from its executable file. So, something is missing.
Because of this, I want to make an installer to properly install my application on the computer, so that I could give it to my friend and he could run my application easily.

My question is, what should I put inside my installer? How do I make an installer for my Qt application?

Thanks for answers.

Platform: Windows
Qt4