Try this code which worked in my case.

#include <stdio.h>

#include <windows.h>

#include <sql.h>

#include <sqlext.h>

//#include <odbcss.h>

#include ".\\sqlncli.h"

SQLHENV henv = SQL_NULL_HENV;

HDBC hdbc1 = SQL_NULL_HDBC;

typedef RETCODE (CALLBACK* SQL_API bcp_initA123 )(HDBC, LPCSTR, LPCSTR, LPCSTR, INT);

typedef...