The WSAGetServiceClassNameByClassId function retrieves the name of the service associated with the specified type. This name is the generic service name, like FTP or SNA, and not the name of a specific instance of that service.
INT WSAGetServiceClassNameByClassIdW(
LPGUID lpServiceClassId,
LPWSTR lpszServiceClassName,
LPDWORD lpdwBufferLength
)
lpServiceClassId
Type: LPGUID
[in]
A pointer to the GUID for the service class.
lpszServiceClassName
Type: LPWSTR
[out]
A pointer to the service name.
lpdwBufferLength
Type: LPDWORD
[in, out]
On input, the length of the buffer returned by lpszServiceClassName, in characters. On output, the length of the service name copied into lpszServiceClassName, in characters.
Type: INT
The WSAGetServiceClassNameByClassId function returns a value of zero if successful. Otherwise, the value SOCKET_ERROR is returned, and a specific error number can be retrieved by calling WSAGetLastError.
| Return code | Description |
|---|---|
| WSA_INVALID_PARAMETER | The lpServiceClassId parameter specified is invalid. |
| WSA_NOT_ENOUGH_MEMORY | There was insufficient memory to perform the operation. |
| WSAEACCES | The calling routine does not have sufficient privileges to access the information. |
| WSAEFAULT | The specified buffer pointed to by lpszServiceClassName is too small. Pass in a larger buffer. |
| WSAENOBUFS | No buffer space available. |
| WSAEOPNOTSUPP | The operation is not supported for the type of object referenced. This error is returned by some namespace providers that do not support getting service class information. |
| WSANO_DATA | The lpServiceClassId is valid, but no data of the requested type was found. |
| WSANOTINITIALISED | The WS2_32.DLL has not been initialized. The application must first call WSAStartup before calling any Windows Sockets functions. |
Header: Declared in winsock2.h.
Library: Use ws2_32.lib.