If you want to know how tou can control your Arduino with your PC or let your Arduino show data on your PC, then follow my steps. To do this you will need some software for creating interfaces. With WD Interface Maker you can create applications and export them to .exe. It's totaly free to download and use it.
Step 1: Download WD Interface Maker
Download the free software for free at this link: http://wesleydeblaere100.wix.com/wdinterfacemaker. The software is still developping so the website is not very profesional yet.
Step 2: Use It
Use the example projects on the site and in the software to learn how to use it easily.