browsing remote machine

I want to be able to browse the remote machine using asp. Here's what I have so far.
Machine A: Web Server
Machine B: Encoding Machine using dcom
Machine C: User

User connects to the web server and wants to browse the encoding machine and select a configuration file and use this file to create the encoder object.

I can make everything work except to browse the encoding machine and select the file. Currently, if I manually put in the location of the file, i.e., "c:\config\myfile.wme" in the input box, it works. I want to be able to have the user browse that machine and select the file instead of having to manually input the location.

Thanks for any help.

Mike@spb