Go to app store and search "hipporemote" i would suggest getting pro version instead of free.
After installing app on iphone, start computer and go to www.hipporemote.com for pc host
Once done that open hipporemote host and note down your IP address
Make sure both your Iphone and Computer are connected to same network i.e. your wifi network
Start Hipporemote on iphone
Add your connection (pc ip address) refer setup instruction for help.
Once done. Connect remote to pc :) enjoy the funtions
Theres much more...enjoy!!!
- HippoVNC host
- Wifi connection