General Constants

The following constants are used throughout the Windows Biometric Framework.

Constant/valueDescription
SECURITY_MAX_SID_SIZE

The maximum length of a security identifier (SID) value. Currently this is 68.

WINBIO_UNIT_ID

ID number of a biometric unit.

WINBIO_SESSION_HANDLE

An unsigned long integer that contains the handle for an open biometric session.

WINBIO_FRAMEWORK_HANDLE

An unsigned long integer that contains the handle for an open framework session.

WINBIO_UUID

A GUID.

WINBIO_STRING

A byte array that contains a null-terminated Unicode string.

WINBIO_MAX_STRING_LEN

The maximum length of a WINBIO_STRING value. Currently this is 256.

WINBIO_MAX_SAMPLE_BUFFER_SIZE
0x7FFFFFFF

The maximum number of bytes in a single biometric data capture.

Requirements

Minimum supported client

Windows 7 [desktop apps only]

Minimum supported server

Windows Server 2008 R2 [desktop apps only]

Header

Winbio_types.h (include Winbio.h)

See also

Client Application Constants

 

 

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