Android Alarm Clock Modifying & Perform Something After Dismissed -

i app developer wants tasks using alarm clock on android phone. have 2 questions,

1. i using samsung galaxy s4 , use innate/default alarm clock everyday. how can program app can access default alarm clock , set alarm?

2. i've been searching through haven't seen focused answers. want app when dismiss alarm clock. how can this? using broadcast receiver? or how using alarmclock class's action_alarm_dismiss?

please provide insights.

thank you