Closeing shared files

Yesterday I stack with a problem of opening and writing some information to file in AD domainm which was open by one user. I noticed that when someone open a file, then I can not do anything with it untill the time when he will close the file.

My question is :

Is it possible to close such session to the file for this user thru the vb.net or cscript code ?
My program need to get full acceces to some files and I need to be sure that all of them will be close before starting my application.

Thank you in advance for help
M.

[549 byte] By [MariuszGorzoch] at [2008-3-6]