EXPLICIT_ACCESS_A structure (accctrl.h)

The EXPLICIT_ACCESS structure defines access control information for a specified trustee. Access control functions, such as SetEntriesInAcl and GetExplicitEntriesFromAcl, use this structure to describe the information in an access control entry(ACE) of an access control list (ACL).

Syntax

typedef struct _EXPLICIT_ACCESS_A {
  DWORD       grfAccessPermissions;
  ACCESS_MODE grfAccessMode;
  DWORD       grfInheritance;
  TRUSTEE_A   Trustee;
} EXPLICIT_ACCESS_A, *PEXPLICIT_ACCESS_A, EXPLICIT_ACCESSA, *PEXPLICIT_ACCESSA;

Members

grfAccessPermissions

A set of bit flags that use the ACCESS_MASK format to specify the access rights that an ACE allows, denies, or audits for the trustee. The functions that use the EXPLICIT_ACCESS structure do not convert, interpret, or validate the bits in this mask.

grfAccessMode

A value from the ACCESS_MODE enumeration. For a discretionary access control list (DACL), this flag indicates whether the ACL allows or denies the specified access rights. For a system access control list (SACL), this flag indicates whether the ACL generates audit messages for successful attempts to use the specified access rights, or failed attempts, or both. When modifying an existing ACL, you can specify the REVOKE_ACCESS flag to remove any existing ACEs for the specified trustee.

grfInheritance

A set of bit flags that determines whether other containers or objects can inherit the ACE from the primary object to which the ACL is attached. The value of this member corresponds to the inheritance portion (low-order byte) of the AceFlags member of the ACE_HEADER structure. This parameter can be NO_INHERITANCE to indicate that the ACE is not inheritable; or it can be a combination of the following values.

Value	Meaning
CONTAINER_INHERIT_ACE	Other containers that are contained by the primary object inherit the ACE.
INHERIT_NO_PROPAGATE	Inherit but do not propagate.
INHERIT_ONLY	Inherit only.
INHERIT_ONLY_ACE	The ACE does not apply to the primary object to which the ACL is attached, but objects contained by the primary object inherit the ACE.
NO_INHERITANCE	Do not inherit.
NO_PROPAGATE_INHERIT_ACE	The OBJECT_INHERIT_ACE and CONTAINER_INHERIT_ACE flags are not propagated to an inherited ACE.
OBJECT_INHERIT_ACE	Noncontainer objects contained by the primary object inherit the ACE.
SUB_CONTAINERS_AND_OBJECTS_INHERIT	Both containers and noncontainer objects that are contained by the primary object inherit the ACE. This flag corresponds to the combination of the CONTAINER_INHERIT_ACE and OBJECT_INHERIT_ACE flags.
SUB_CONTAINERS_ONLY_INHERIT	Other containers that are contained by the primary object inherit the ACE. This flag corresponds to the CONTAINER_INHERIT_ACE flag.
SUB_OBJECTS_ONLY_INHERIT	Noncontainer objects contained by the primary object inherit the ACE. This flag corresponds to the OBJECT_INHERIT_ACE flag.

Trustee

A TRUSTEE structure that identifies the user, group, or program (such as a Windows service) to which the ACE applies.

Remarks

Note

The accctrl.h header defines EXPLICIT_ACCESS_ as an alias that automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that is not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Header	accctrl.h

See also

ACCESS_MASK

ACCESS_MODE

ACE

ACE_HEADER

ACL

BuildExplicitAccessWithName

BuildSecurityDescriptor

GetExplicitEntriesFromAcl

LookupSecurityDescriptorParts

SetEntriesInAcl

TRUSTEE