Referring to a Local Machine from a WebService

Hi there,

i have a simple application which connects to a web service and then this web service creates a file on the machine which the application was accessed on…

the problem i have though is that when i use the web service im not sure how i need to or the format to refer to the local machine (i.e do i use machine name, the IP address??) in order to save the file to this local machine.

Any help would be much appreciated!

Phil