Miles before check engine light reset

[Couper1]

2 part question if anyone can help. I searched but couldn't find the answers.

#1) Can you actually "completely" reset the check engine light by disconnecting the battery? I disconnected the battery and the light went out but does that really reset the codes?

#2) Once the check engine light is reset, how many miles do you need to drive the car before it can pass inspection? I drove mine 109 miles and it did not pass the emissoins test?

Thanks for your help.