DTMF decoder

i intend to build a very simple program, that will talk to another computer by DTMF. i need a DTMF decoder that will listen to voice data stream, and decode DTMF's. the way it will work is very flexible. what i thought of might be an activeX component that will fire an event whenever it hears '#', and then give as a parameter the string it picked up since the last event; yet, i am willing to hear other suggestions as well, if someone has anything already built. i dont need anything really professional, but i need it REAL FAST. ## Deliverables Complete and fully-functional working program(s) in executable or in activeX component form, and it could be nice to have complete source code of all work done, but i dont really need it. i dont care about Complete copyrights to all work purchased, just let me have it! ## Platform it has to work on both 98 and XP.