The IsDestinationReachable function determines whether or not a specified destination can be reached, and provides Quality of Connection (QOC) information for a destination.

Windows Vista:  Not supported. This function always returns ERROR_CALL_NOT_IMPLEMENTED.

Syntax

BOOL IsDestinationReachable(
  __in     LPCSTR lpszDestination,
  __inout  LPQOCINFO lpQOCInfo
);

Parameters

lpszDestination

A pointer to a null-terminated string that specifies a destination. The destination can be an IP address, UNC name, or URL.

lpQOCInfo

A pointer to the QOCINFO structure that receives the Quality of Connection (QOC) information. You can supply a NULL pointer if you do not want to receive the QOC information.

Return Value

Remarks

Client applications use this function to determine the QOC information before proceeding with network operations. For standalone computers that are directly connected to a network through a network card or remote access server (RAS), this function generates minimal network traffic with RPC calls to the nearest router. For computers that are part of a network where a destination can be reached by using RAS or a network gateway, this function pings a destination to generate accurate QOC information.

This function is only available for TCP/IP connections. A caller supplies the buffer for the QOCINFO structure, and must release the memory when it is not needed.

Requirements

See Also

About System Event Notification Service
IsNetworkAlive
QOCINFO

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Build date: 2/7/2008