SOCKET in winsock2.h not accepted in visual studio 2017 - c++

Question

Getting error i freetds headers when i include them in my VS 2017 c++ project
in tds.h when i include that in my project
include\tds.h(1331): error C3646: 's': unknown override specifier
include\tds.h(1331): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
include\tds.h(1641): error C2065: 'TDS_SYS_SOCKET': undeclared identifier
include\tds.h(1641): error C2146: syntax error: missing ')' before identifier 's'
I am trying to use freetds 0.91.100 version in my c++ application which was built using VS 2010. It was fine then.
Now after migrating my C++ project to VS 2017 i am getting strange errors.
I have built freetds lib as well in VS 2017.
freetds has this declaration in tds_sysdep_private.h
#if !defined(__WIN32__) && !defined(_WIN32) && !defined(WIN32)
typedef int TDS_SYS_SOCKET;
#define INVALID_SOCKET -1
#define TDS_IS_SOCKET_INVALID(s) ((s) < 0)
#else
typedef SOCKET TDS_SYS_SOCKET;
#define TDS_IS_SOCKET_INVALID(s) ((s) == INVALID_SOCKET)
#endif
and the tds.h has
struct tds_socket
{
TDS_SYS_SOCKET s; /**< tcp socket, INVALID_SOCKET if not connected */
}
And the error is on this TDS_SYS_SOCKET declaration
My code include this header this way.
tdsloader.h
using namespace std;
#if defined (__cplusplus)
extern "C" {
#endif
#include "tds.h"
#if defined (__cplusplus)
}
#endif
As per the declaration of TDS_SYS_SOCKET in tds_sysdep_private.h , in case of windows build it is defined as SOCKET which is from winsock2.h
I read in other threads that the order of header file includion is important and i made sure that winsock2.h is included before windows.h or any other windows header file.
Now that SOCKET from winsock2.h is
typedef UINT_PTR SOCKET;
which in an unsigned , why is VS 2017 not able to recognize the type ?
Build should go through smoothly as it did in VS 2010.
Now with VS 2017 it shows build errors.

Answer 1

Here's the include order that works fine with VS 2017:
#include <tds_sysdep_private.h>
#include <tds.h>
alternatively you can:
#define _FREETDS_LIBRARY_SOURCE
#include <tds.h>