WSAEnumNameSpaceProviders
The Windows Sockets
WSAEnumNameSpaceProviders function retrieves information about available name spaces.
INT WSAAPI WSAEnumNameSpaceProviders (
LPDWORD lpdwBufferLength,
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LPWSANAMESPACE_INFO lpnspBuffer
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);
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Parameters
lpdwBufferLength
[in/out] On input, the number of bytes contained in the buffer pointed to by
lpnspBuffer. On output (if the function fails, and the error is WSAEFAULT), the minimum
number of bytes to pass for the
lpnspBuffer to retrieve all the requested information. The passed-in buffer must be
sufficient to hold all of the name space information.
lpnspBuffer
[out] A buffer which is filled with
WSANAMESPACE_INFO structuresdescribed below. The returned structures are located consecutively
at the head of the buffer. Variable sized information referenced by pointers in
the structures point to locations within the buffer located between the end of
the fixed sized structures and the end of the buffer. The number of structures
filled in is the return value of
WSAEnumNameSpaceProviders.
Return Values
WSAEnumNameSpaceProviders returns the number of
WSANAMESPACE_INFO structures copied into
lpnspBuffer. Otherwise, the value SOCKET_ERROR is returned, and a specific error number
may be retrieved by calling
WSAGetLastError.
Error Codes
WSAEFAULT
| the buffer length was too small to receive all the relevant WSANAMESPACE_INFO structures and associated information. Pass in a buffer at least as large as
the value returned in lpdwBufferLength.
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WSANOTINITIALIZED
| The Windows Sockets 2 DLL has not been initialized. The application must first
call WSAStartup before calling any Windows Sockets functions.
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