Hello,
my name is George Chondrompilas. I have 4 years experience on .NET technologies so I have been involved in a lot of projects. My idea on how to do it is to add a service or socket on client-side app which will receive and send data to your application. I have already implement a service like that so it will not be a problem to do it again. Unfortunately, I am new to freelancer.com so I have nothing to prove my skills to you. Thanks.
Sincerely,
George