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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| No
| Win32s
| No
| Import Library
| -
| Header File
| winnt.h
| Unicode
| No
| Platform Notes
| None
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ACCESS_MASK
The ACCESS_MASK structure is one doubleword value containing standard, specific, and generic
rights. These rights are used in access-control entries (ACEs) and are the
primary means of specifying the requested or granted access to an object.
typedef DWORD ACCESS_MASK;
The bits in this value are allocated as follows:
Bits
| Meaning
| 0 through 15
| Specific rights. Contains the access mask specific to the object type
associated with the mask.
| 16 through 23
| Standard rights. Contains the object's standard access rights and can be a
combination of the following predefined flags:
|
| Bit
| Flag
| Meaning
|
| 16
| DELETE
| Delete access
|
| 17
| READ_CONTROL
| Read access to the owner, group, and discretionary access-control list (ACL)
of the security descriptor
|
| 18
| WRITE_DAC
| Write access to the discretionary access-control list (ACL)
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| 19
| WRITE_OWNER
| Write access to owner
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| 20
| SYNCHRONIZE
| Windows NT: Synchronize access
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Bits
| Meaning
| 24
| Access system security (ACCESS_SYSTEM_SECURITY). This flag is not a typical
access type. It is used to indicate access to a system ACL. This type of access
requires the calling process to have a specific privilege.
| 25
| Maximum allowed (MAXIMUM_ALLOWED)
| 26 through 27
| Reserved
| 28
| Generic all (GENERIC_ALL)
| 29
| Generic execute (GENERIC_EXECUTE)
| 30
| Generic write (GENERIC_WRITE)
| 31
| Generic read (GENERIC_READ)
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The following constants represent the specific and standard access rights:
#define SPECIFIC_RIGHTS_ALL 0x0000FFFF
#define STANDARD_RIGHTS_REQUIRED 0x000F0000
#define STANDARD_RIGHTS_ALL 0x001F0000
See Also
GENERIC_MAPPING
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