[help] with terraria mod

I am new to programing ect.. I would like to add a few commands to my game like "instant mine" and "flashlight" "free craft" and or "item" nothing big.. or at least i don't think it is.. i have Microsoft 2010 c# express and have Terrarria.exe decompressed with Reflector and opened it up in c#. I don't know how to or where to put these commands. If someone could help it would be greatly appreciated.

If you are new to coding, let alone modding terraria, you should check out Deathly's tutorials on ******.

Link:
https://******.com/Deathly/TerrariaAPI/wiki