how to control write actions to a folder

The problem:

At the office there is an application running that made dedicated jobs with
one or more plotfiles in it.
These jobs are transfered to a drive\folder. For every job there is a
directory created

something like this:

c:\test\1
a.plt
b.plt
c:\test\2
aa.plt
c:\test\3
cc.plt
dd.plt
.....
zz.plt


I have to build a peace of code to split up the jobs to different servers (a
kind of dispatch/ load-balancing)

I've build the dispatch-part with the fso.movefolder method.
But how can I control the folder so that the job is complete in it. I've
tried to control the folder with FileSystemWatch er in combination with the
fso.datelastacc essed but I get stuck.
Is there something like a folderopen, folderclose, folderaccess property to
check if a folder is in use.

with regards
Arian