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Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

CDacl Class

This class is a wrapper for a DACL (discretionary access-control list) structure.

class CDacl : public CAcl

An object's security descriptor can contain a DACL. A DACL contains zero or more ACEs (access-control entries) that identify the users and groups who can access the object. If a DACL is empty (that is, it contains zero ACEs), no access is explicitly granted, so access is implicitly denied. However, if an object's security descriptor does not have a DACL, the object is unprotected and everyone has complete access.

To retrieve an object's DACL, you must be the object's owner or have READ_CONTROL access to the object. To change an object's DACL, you must have WRITE_DAC access to the object.

Use the class methods provided to create, add, remove, and delete ACEs from the CDacl object. See also AtlGetDacl and AtlSetDacl.

For an introduction to the access control model in Windows, see Access Control in the Windows SDK.

Header: atlsecurity.h

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