Restrict use of a network directory only while a program is running in windows

My software needs to read, and sometimes write files in a common directory in the network.
We have users type A and users type B. Users type A can write and read files in that directory, Users type B must only read in that directory but not write.
Outside my software, users should not read or write in that directory.
All users belong to the same domain.
I've tried to solve this with "net use X: ... " but it remains connected when my software ends and, while it is running, users can access drive X: so a batch file (with net use, MySoftware, net use /delete) is not a solution.
By the way, my software is developed using vb.net 2010.
Any idea to solve this?
BemboXAsked:
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DaveCommented:
the classic solution would be client server, so you write a server app and connect using a pipe. otherwise you could have the program impersonate a second user e.g. "TYPEA" and "TYPEB" and set the share security appropriatly. details here:-

http://blogs.msdn.com/b/shawnfa/archive/2005/03/21/400088.aspx

http://williamfaulkner.co.uk/2009/04/vbnet-run-as-administrator-impersonate-a-user-2008/

or if you feel very brave just use hidden shares with "$" names and use UNC's not mappings in your program.

Have fun...

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BemboXAuthor Commented:
Thanks a lot!!!
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