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WSAGetLastError
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#include <stdio.h>
#include <winsock2.h>
int
main()
{
WSADATA wsaData;
SOCKET sock;
WSAStartup(MAKEWORD(2,0), &wsaData);
sock = socket(AF_UNSPEC, SOCK_STREAM, 0);
if (sock == INVALID_SOCKET) {
printf("error : %d\n", WSAGetLastError());
return 1;
}
WSACleanup();
return 0;
}
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