My carp notes

Carp must be in the process of feeding before they will consider your fly. carp will take many of the same flies that trout take but only when they are in the process of feeding themselves. So don't think that normal fly fishing tactics will work, they won't. carp do not chase flies! when carp are feeding, your fly must be in their feeding zone. the feeding zone is triangular shaped with the apex of the triangle starting at the carp's mouth. the base of the triangle is about 2 feet from the mouth. put your fly in that zone & the carp will "consider" your fly. the most important thing to know is that your presentation of the fly to the carp must be accurate. if your presentation is sloppy, you will spook the carp and it will leave the area. once your fly is in the feeding zone, make small moves with the fly (less than 3 inches) or twitch the fly. carp do not like fast movement or big movements. carp do not like seeing you so use stealth. remember if you can see the carp, the carp can see you! cast no shadows on the water. do not over line carp when casting. 

Carp fishing with flies is sight fishing with flies.  rarely will you be able to catch a carp by blind casting.
there is no magic fly that always catches carp.  your presentation of your fly to the carp must be perfect.   
I also recommend that you fish with someone who has caught a carp on a fly before your first attempt to fly fish for them.

Carp are omnivores and they take many of the same flies that trout take.  carp must be feeding in order to get them to take your fly.  when a carp is feeding, your fly must be in their feeding zone; which is an imaginary triangle where the apex of the triangle is the carp's mouth.  The base of the triangle is about two feet from the carp's mouth.  Presentation of your fly is critical.  carp don't like people.  If you can see the carp, the carp can see you.  use stealth when fishing for carp.  cast no shadows on the water.  move slowly.
A basic fly I use for carp feeding on the bottom is the wooly bugger ( white #12).  Move the fly an inch or so when it is in front of the carp.  On the surface, I like to use deer hair flies which resemble bread,berries or other things carp eat.  I've caught carp using tarantulas, madam X, nymphs, terrestrials and streamers.  Accuracy and patience are very important because carp are shy but very alert!