help! command keys and keys in gta 4

[lamlam 0]

i need to know some codes about: GTA.Native.Function.Call.
i want to burn the target ped that player aim at by click LMB, so i have code:

Ped Burn = Player.GetTargetedPed();if (Game.isGameKeyPressed(GameKey.Attack) && Burn.Exists() ){      GTA.Native.Function.Call("START_CHAR_FIRE", Burn);  }

i don't know, is it right? please help!

Edited April 2 by lamlam