NOOB Question! need help with IRremote library

If you look in the examples supplied with the IR Library GitHub - Arduino-IRremote/Arduino-IRremote at 3f70ad2e4c95d88dde93ce2ffa63d316f07390d5 (specifically the IRrecvDemo.ino demo) you will see where it just reads and displays the IR code recieved.

void loop() {
  if (irrecv.decode(&results)) {
    Serial.println(results.value, HEX);
    irrecv.resume(); // Receive the next value
  }
}

All you would need to do is replace the 'Serial.println(results.value, HEX);' with suitable code that act on the specific IR code(s) you want it to.