WSANSCLASSINFOA structure (winsock2.h)

The WSANSCLASSINFO structure provides individual parameter information for a specific Windows Sockets namespace.

Syntax

typedef struct _WSANSClassInfoA {
  LPSTR  lpszName;
  DWORD  dwNameSpace;
  DWORD  dwValueType;
  DWORD  dwValueSize;
  LPVOID lpValue;
} WSANSCLASSINFOA, *PWSANSCLASSINFOA, *LPWSANSCLASSINFOA;

Members

lpszName

String value associated with the parameter, such as SAPID, TCPPORT, and so forth.

dwNameSpace

GUID associated with the namespace.

dwValueType

Value type for the parameter, such as REG_DWORD or REG_SZ, and so forth.

dwValueSize

Size of the parameter provided in lpValue, in bytes.

lpValue

Pointer to the value of the parameter.

Remarks

The WSANSCLASSINFO structure is defined differently depending on whether ANSI or UNICODE is used. The above syntax block applies to ANSI; for UNICODE, the datatype for lpszName is LPWSTR.

Note

The winsock2.h header defines WSANSCLASSINFO as an alias which 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 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 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	winsock2.h

See also

WSASERVICECLASSINFO