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General Constants (Winbio_types.h)

The following constants are used throughout the Windows Biometric Framework.

Constant/value Description
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

Requirement Value
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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