I'm finding a way to prevent a shared folder from being copied by LAN users.
Is there a way for Windows XP ?
If there is any good software out for the purpose, please suggest me.
By definition, a read only file is able to read and copied from start to EOF but is not able to be written to. If you grant read permissions to a file, you also grant the permission to copy that file's contents to another medium. The only way to prevent the files in question from being copied is to deny read access to the files.
You cannot have files be read only AND not copyable.
You can't prevent them copying it, but if you are in an active directory environment, you can deploy Active Directory Rights Management Services, which could prevent the copied file from being usable elsewhere.
You can also revoke a user's rights to the file at any time, which will prevent them from doing anything with any copies of the file.