I have to post a file to a web page every night,  currently this is done
manually, but I want to script it.  The way I have tried is to use a
webbrowser control, open the page set the file name in the file input to the
locsl file, and then post the page, however the inout doesn't allow me to
change the value, is there a way to do this using the inet control? if so
how?

As far as I know, no value can be set to the input tag. I had faced a
similar problem while trying to upload a directory, i.e. all the files in a
selected directory once.