void FDWrite(SOCKET Sock, HANDLE HandleToFile) {
	//a static variable so that data is not allocated on each function call

	static TransferBuffer[SizeOfMySocketsBuffer];
	BOOL ReadFileRValue;
	DWORD NumBytesRead = 0;

	//read from the file or from your memory buffer. do whatever you like. I used this as an example

	if (!(ReadFileRValue = ReadFile(HandleToFile, TransferBuffer, SizeOfMySocketsBuffer, &NumBytesRead, NULL))) {
		EndTransfer(); //unable to read from file

		return;
	}

	//If the return value is nonzero and the number of bytes read is zero, the file pointer was beyond the 

	//current end of the file at the time of the read operation. 

	//transfer complete

	if (ReadFileRValue && NumBytesRead == 0) {
		EndTransfer(); //function to end your file transfer. call the shutdown() function, CloseFile() etc...

		return;
	}


	//this is the send loop, it will send the data then resend it to cause a WSAEWOULDBLOCK

	//in reality, this loop should be done only 2 times

	while(TRUE) {
		if (send(Sock, TransferBuffer, NumBytesRead, 0) == SOCKET_ERROR) { //send the whole read buffer

			if (WSAGetLastError() != WSAEWOULDBLOCK) {
				EndTransfer(); //socket error!!!

				return;
			}
			else {
				return; //we have filled the buffer, we will wait for another FD_WRITE...

			}
		}
		//we have read less than SizeOfMySocketsBuffer from our file, which means that either the file was smaller than

		//the buffer or we have finished reading it.

		if (NumBytesRead < SizeOfMySocketsBuffer) {
			EndTransfer();
			return;
		}
	}
}