Vista - WMI and file replication

I am trying to write a script to replicate the files uploaded to a FTP site
but I
cannot find the best solution for this problem.

For example I can try to use “__InstanceCreationEvent� to know when a file is
created however this will not show me when the upload ends.

In other words, if somebody will try to upload a big file I will know when
the
process started but because the process can take probably more than a
minute (until the file is fully uploaded) I will not know when I can
replicate the file
so “__InstanceCreationEvent� is not the best option.

Is there anything else I can use to solve this problem?


TIA,

Don