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getprotobynumber.md

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Function name : getprotobynumber

Group: Windows Sockets 2 (Winsock) - Library: ws2_32

The getprotobynumber function retrieves protocol information corresponding to a protocol number.

Code examples:

Winsock: how to retrieve the protocol information corresponding to a protocol number

Declaration:

struct PROTOENT FAR * getprotobynumber(
  int number
);

FoxPro declaration:

DECLARE INTEGER getprotobynumber IN ws2_32;
	INTEGER number

Parameters:

number [in] Protocol number, in host byte order.

Return value:

If no error occurs, getprotobynumber returns a pointer to the protoent structure. Otherwise, it returns a NULL pointer and a specific error number can be retrieved by calling WSAGetLastError.