How can I make a directory read-only, but have its subdirectories be read-write?

To enforce read-only access a particular directory, but not its subdirectories, add two access rules like those shown by the following pseudocode:

CBFilter.AddFilterRule("C:\\ReadOnly\\*.*", ACCESS_READ_ONLY, ..., ...); // Note that ACCESS_NONE (0) means "no access restrictions". CBFilter.AddFilterRule("C:\\ReadOnly\\AllAccess\\*.*", ACCESS_NONE, ..., ...);

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