Many thanks Roy
I'm sorry for the delay in replying.
Because I had never seen this anywhere else, I imagined there was no advantage.
I imagined using it in conjunction with "vla-GetRemoteFile" and an de/encryption routine.
I have no real use for it, just fertile imagination.
Thank you very much for responding.
If anybody else has any comments, please.
It is always good to learn from this forum.