On-Rev File Browser Upload Dialog

[Rick Harrison]

I really don't want to re-invent the wheel today.

How can I get a simple file browser upload dialog
to upload a file using an irev script located at On-Rev.

I understand that I'll probably be using 
libURLftpUploadFile for this.

If this were just a stack I'd be using:

answer file "Please choose the file to upload"

to generate the dialog.  As I understand it, 'answer'
just doesn't work for irev scripts.

This seems like such a basic need, that I can't
imagine that no one has done this before.

If you have any example code, that would be excellent.

Thanks in advance!

Rick