Invalid socket

I am writing a code to connect to a socket.
But when I use the function MySocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); it always returns invalid socket.
I donĀ“t know why this happens.

Any light would be very appreciated.

What error does WSAGetLastError() return?

The MSDN entry for the socket() function lists assorted error along with their likely causes.
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