Hi so how would I make it so if you right click an item it gives you creative mode flight in survival. Also if you right click it again it makes it so you cant fly anymore?

The EntityPlayer#capabilities field holds the player's PlayerCapabilities instance. The PlayerCapabilities#allowFlying field controls whether or not the player can fly.

Okay but how would I implement this?

Override Item#onItemRightClick to toggle the EntityPlayer's flight ability using the fields I described in my original post.

 

You'll probably want to do this on the server and call EntityPlayer#sendPlayerAbilities to sync it with the client (I haven't tried to implement this, so I'm not entirely sure).

Again im not really sure how I would program this do you think you would be able to show me how to add it with the code step by step?

Show what you tried, if you can't even think of a way of starting working on this then read "Modder Support" sub-forum description.

You can't start modding without most basic knowledge and Minecraft (Forge) is NOT the place to learn it, it's seriously complex.

 

Also - there are plenty of tutorials on google that tell you exacly how to use those methods, even with flight probably.