AutoIt Help needed : General & Trouble Shooting

ok so seeing as i cant find any free macros im gonan make one my self so i downlaoded autoit and ive made the gui for it and ive got all the code and stuff for the macro now i jsut need help wiht actually making it so when you click a button the macro activates and you click another one it stops.

also im a noob so keep it simple

Could you provide the code? its a lot easier to know what your talking about if I could see it. If you dont want to post the source, I understand.