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SetServiceA function (nspapi.h)

The SetService function registers or removes from the registry a network service within one or more namespaces. The function can also add or remove a network service type within one or more namespaces.

Note  The SetService function is obsolete. The functions detailed in Protocol-Independent Name Resolution provide equivalent functionality in Windows Sockets 2. For the convenience of Windows Sockets 1.1 developers, the reference material is as follows.

Syntax

INT SetServiceA(
 [in] DWORD dwNameSpace,
 [in] DWORD dwOperation,
 [in] DWORD dwFlags,
 [in] LPSERVICE_INFOA lpServiceInfo,
 [in, optional] LPSERVICE_ASYNC_INFO lpServiceAsyncInfo,
 [out] LPDWORD lpdwStatusFlags
);

Parameters

[in] dwNameSpace

The namespace, or a set of default namespaces, within which the function will operate.

Use one of the following constants to specify a namespace.

Value Meaning
NS_DEFAULT
 A set of default namespaces. The function queries each namespace within this set. The set of default namespaces typically includes all the namespaces installed on the system. System administrators, however, can exclude particular namespaces from the set. NS_DEFAULT is the value that most applications should use for dwNameSpace.
NS_DNS
 The Domain Name System used in the Internet to resolve the name of the host.
NS_NDS
 The NetWare 4 provider.
NS_NETBT
 The NetBIOS over TCP/IP layer. All Windows systems register their computer names with NetBIOS. This namespace is used to convert a computer name to an IP address that uses this registration.
NS_SAP
 The NetWare Service Advertising Protocol. This can access the NetWare bindery, if appropriate. NS_SAP is a dynamic namespace that enables the registration of services.
NS_TCPIP_HOSTS
 Lookup value in the <systemroot>\system32\drivers\etc\posts file.
NS_TCPIP_LOCAL
 Local TCP/IP name resolution mechanisms, including comparisons against the local host name and lookup value in the cache of host to IP address mappings.

[in] dwOperation

The operation that the function will perform. Use one of the following values to specify an operation:

Value Meaning
SERVICE_REGISTER
 Register the network service with the namespace. This operation can be used with the SERVICE_FLAG_DEFER and SERVICE_FLAG_HARD bit flags.
SERVICE_DEREGISTER
 Remove from the registry the network service from the namespace. This operation can be used with the SERVICE_FLAG_DEFER and SERVICE_FLAG_HARD bit flags.
SERVICE_FLUSH
 Perform any operation that was called with the SERVICE_FLAG_DEFER bit flag set to one.
SERVICE_ADD_TYPE
 Add a service type to the namespace.

For this operation, use the ServiceSpecificInfo member of the SERVICE_INFO structure pointed to by lpServiceInfo to pass a SERVICE_TYPE_INFO_ABS structure. You must also set the ServiceType member of the SERVICE_INFO structure. Other SERVICE_INFO members are ignored.
SERVICE_DELETE_TYPE
 Remove a service type, added by a previous call specifying the SERVICE_ADD_TYPE operation, from the namespace.

[in] dwFlags

A set of bit flags that modify the function's operation. You can set one or more of the following bit flags:

Value Meaning
SERVICE_FLAG_DEFER
 This bit flag is valid only if the operation is SERVICE_REGISTER or SERVICE_DEREGISTER.

If this bit flag is one, and it is valid, the namespace provider should defer the registration or deregistration operation until a SERVICE_FLUSH operation is requested.
SERVICE_FLAG_HARD
 This bit flag is valid only if the operation is SERVICE_REGISTER or SERVICE_DEREGISTER.

If this bit flag is one, and it is valid, the namespace provider updates any relevant persistent store information when the operation is performed.

For example: If the operation involves deregistration in a namespace that uses a persistent store, the namespace provider would remove the relevant persistent store information.

[in] lpServiceInfo

A pointer to a SERVICE_INFO structure that contains information about the network service or service type.

[in, optional] lpServiceAsyncInfo

Reserved for future use. Must be set to NULL.

[out] lpdwStatusFlags

A set of bit flags that receive function status information. The following bit flag is defined:

Value Meaning
SET_SERVICE_ PARTIAL_SUCCESS
 One or more namespace providers were unable to successfully perform the requested operation.

Return value

If the function fails, the return value is SOCKET_ERROR. To get extended error information, call GetLastError. GetLastError can return the following extended error value.

Error code Meaning
ERROR_ALREADY_ REGISTERED
 The function tried to register a service that was already registered.

Remarks

Note

The nspapi.h header defines SetService as an alias that 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 is 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]
Target Platform Windows
Header nspapi.h
Library Mswsock.lib
DLL Mswsock.dll

See also

GetService

SERVICE_INFO

SERVICE_TYPE_INFO_ABS

Winsock Functions

Winsock Reference

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