I would like to find out the proper method for passing variables from a web document to an asx file.
What I want to do is pass a specific file name from a webpage to the playback .asx where the filename varies but the rest of the .asx file remains the same.
Inside the .asx file (playback.asx) there is a path to get the file:
<REF "http:domain.com/dir/mediafile" />
I want to make 'mediafile' a variable (filename) and call it using a URL address link, like this -
http://domain.com/playback.asx?filename=mediafile
I am just learning about html headers and asx files so my knowledge level is very GREEN

Can someone help explain how to do this?
Your help is much appreciated! Thank you....