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NSPLookupServiceEnd function

The NSPLookupServiceEnd function is called to free the handle after previous calls to NSPLookupServiceBegin and NSPLookupServiceNext.

It is possible to receive an NSPLookupServiceEnd call on another thread while processing an NSPLookupServiceNext. This indicates that the client has canceled the request and the provider should close the handle and return from the NSPLookupServiceNext call as well, setting the last error to WSA_E_CANCELLED.

Syntax


int WSAAPI NSPLookupServiceEnd(
  _In_  HANDLE hLookup
);

Parameters

hLookup [in]

The handle obtained previously by a call to NSPLookupServiceBegin.

Return value

The function should return NO_ERROR (zero) if the routine succeeds. It should return SOCKET_ERROR (–1) if the routine fails and it must set the appropriate error code using WSASetLastError.

Error codeMeaning
WSA_INVALID_HANDLE

The handle is not valid.

WSA_NOT_ENOUGH_MEMORY

There is not enough memory available to perform this operation.

WSAEOPNOTSUPP

The operation is not supported. This error is returned if the namespace provider does not implement this function.

 

Remarks

In Windows Sockets 2, conflicting error codes are defined for WSAECANCELLED and WSA_E_CANCELLED. The error code WSAECANCELLED will be removed in a future version and only WSA_E_CANCELLED will remain. Namespace Providers should use the WSA_E_CANCELLED error code to maintain compatibility with the widest possible range of applications.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Ws2spi.h

See also

NSP_ROUTINE
NSPLookupServiceBegin
NSPLookupServiceNext
WSASetLastError

 

 

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