VS 2010 Accessing Methods and Subroutines

Hi There

I have a project i have been working on for a little while that lives on my server and switches phones around and what not. I don't want to have to log in to my server to use this program and i would like my users to be able to use some of the functionality on it from their computers.

Is there a way of accessing the sub routines in that program from outside of the program.

One idea that i have is to have a file, or database table and use it as an intermediary between one program and the other. IE the program on the users side writes a command to a file, then the every couple of seconds my other program checks the file or table to see if there is a command to execute.

I don't really like this idea, Mainly because i feel that quizzing a database every couple of seconds is a bad idea, and the nature of the sort of command i want to execute, latency would be a bad thing.

also i would imagine that accesing a database that often would keep it too busy??

Any ideas, Many thanks

Ian