WSANAMESPACE_INFOEXA structure (winsock2.h)
The WSANAMESPACE_INFOEX structure contains all registration information for a namespace provider.
Syntax
typedef struct _WSANAMESPACE_INFOEXA {
GUID NSProviderId;
DWORD dwNameSpace;
BOOL fActive;
DWORD dwVersion;
LPSTR lpszIdentifier;
BLOB ProviderSpecific;
} WSANAMESPACE_INFOEXA, *PWSANAMESPACE_INFOEXA, *LPWSANAMESPACE_INFOEXA;
Members
NSProviderId
Type: GUID
A unique GUID for this namespace provider.
dwNameSpace
Type: DWORD
The namespace supported by this provider.
Possible values for the dwNameSpace member are listed in the Winsock2.h include file. Several namespace providers are included with Windows Vista and later. Other namespace providers can be installed, so the following possible values are only those commonly available. Many other values are possible.
fActive
Type: BOOL
If TRUE, indicates that this namespace provider is active. If FALSE, the namespace provider is inactive and is not accessible for queries, even if the query specifically references this namespace provider.
dwVersion
Type: DWORD
The version number of the namespace provider.
lpszIdentifier
Type: LPTSTR
A display string that identifies the namespace provider.
ProviderSpecific
Type: BLOB
A provider-specific data blob associated with namespace entry.
Remarks
The WSANAMESPACE_INFOEX structure is an enhanced version of the WSANAMESPACE_INFO structure that is used by the WSAEnumNameSpaceProvidersEx and the WSCEnumNameSpaceProvidersEx32 functions to return information on available namespace providers. The WSANAMESPACE_INFOEX structure contains the provider-specific data blob associated with the namespace entry passed in the lpProviderInfo parameter to the WSCInstallNameSpaceEx and WSCInstallNameSpaceEx32 functions.
Currently, the only namespace included with Windows that uses information in the ProviderSpecific member of the WSANAMESPACE_INFOEX structure are namespace providers for the NS_EMAIL namespace. The format of the ProviderSpecific member for an NS_EMAIL namespace provider is a NAPI_PROVIDER_INSTALLATION_BLOB structure.
When UNICODE or _UNICODE is defined, WSANAMESPACE_INFOEX is defined to WSANAMESPACE_INFOEXW, the Unicode version of this structure and the lpszIdentifier string member is defined to the LPWSTR data type.
When UNICODE or _UNICODE is not defined, WSANAMESPACE_INFOEX is defined to WSANAMESPACE_INFOEXA, the ANSI version of this structure and the lpszIdentifier string member is defined to the LPSTR data type.
The WSCEnumNameSpaceProvidersEx32 function is a Unicode only function and returns WSANAMESPACE_INFOEXW structures.
Note
The winsock2.h header defines WSANAMESPACE_INFOEX 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 Vista [desktop apps only] |
| Minimum supported server | Windows Server 2008 [desktop apps only] |
| Header | winsock2.h |