Wireless might be difficult... However, I know a way. This is not DIRECTLY from the laptop to projector, but should work anyway.
Here are the steps
1) Get a chromecast. (Must be able to have sound AND image. Some don't. If you already have one, dissconect it from whatever it is at the moment.)
2) Install cast on your laptop. (Unless you already have it)
3) Connect the chromecast to a power source, and the projector.
4) Set the cast up.
5) Connect the chromecast and your laptop.
This may seem much as a single chromecast is £30/$36-ish to buy, but can be used almost anywhere.