Description:
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It will be helpful to make gethostbyname return error status in additional variables like fsockopen does for example in int &errno, string &errstr.

Now gethostbyname returns a string containing the unmodified hostname on failure, but rather often it is desirable to know why the operation failed and output standart system text error message without inventing own ones. That way you can search information on internet with a higher probability to find an answer in case of errors.

It should not be too difficult to implement since WSAGetLastError() from WinSock2 returns generic error code and here you can find error code descriptions. 
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/windows_sockets_error_codes_2.asp

Expected result:
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string gethostbyname ( string hostname[, int &errno [, string &errstr]] )

Actual result:
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string gethostbyname ( string hostname )