curl/docs/examples/win32sockets.c

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/*
* Note: This is only required if you use curl 7.8 or lower, later
* versions provide an option to curl_global_init() that does the
* win32 initialization for you.
*/
/*
* These are example functions doing socket init that Windows
* require. If you don't use windows, you can safely ignore this crap.
*/
#include <windows.h>
void win32_cleanup(void)
{
WSACleanup();
}
int win32_init(void)
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD(1, 1);
err = WSAStartup(wVersionRequested, &wsaData);
if (err != 0)
/* Tell the user that we couldn't find a useable */
/* winsock.dll. */
return 1;
/* Confirm that the Windows Sockets DLL supports 1.1.*/
/* Note that if the DLL supports versions greater */
/* than 1.1 in addition to 1.1, it will still return */
/* 1.1 in wVersion since that is the version we */
/* requested. */
if ( LOBYTE( wsaData.wVersion ) != 1 ||
HIBYTE( wsaData.wVersion ) != 1 ) {
/* Tell the user that we couldn't find a useable */
/* winsock.dll. */
WSACleanup();
return 1;
}
return 0; /* 0 is ok */
}