NOX, sorry to hear about your daughter, takes a while to get your head round it all, our youngest son was diagnosed when he was 10.
He went on school trips abroad, he went off to Uni and did all the normal things they do at Uni like getting drunk, etc., refused to do blood tests for a couple of years in his teens. As he matured he started to take care of himself properly, going to the gym, running, eating better. Best thing though was he got a job in London and was under Guys hospital where they completely changed his insulin regime and he's never looked back. He's now 31 and has recently done a five day DAFNE course..diet and food for normal eating...which he reckons everyone with diabetes would benefit from.
Best of luck, I can imagine exactly how you feel right now..