Keybinds (mod_ file Code)

private KeyBinding key_fly = new KeyBinding("key.fly", 15);

ModLoader.SetInGameHook(this, true, false);

ModLoader.RegisterKey(this, this.key_fly, false);
ModLoader.AddLocalization("key.fly", "Fly");

public boolean OnTickInGame(float f, Minecraft minecraft) {
        PlayerCapabilities m = ModLoader.getMinecraftInstance().thePlayer.capabilities;
        if(fly)
        {
            m.allowFlying = true;
        }
        else
        {
            m.allowFlying = false;
        }
        return true;
                }


public void KeyboardEvent(KeyBinding event)
    {
            Minecraft minecraft = ModLoader.getMinecraftInstance();
            if (event == this.key_fly)
            {
              fly = !fly;
            }
        }

public boolean fly;

Keyboard Values Link: http://img87.imageshack.us/img87/5476/keyboardt.png