include file error?

I have these lines inside my code. I have also included the file in my header list inside my project. But when compile I got the below error. What is my mistake?

#ifndef WIN32
#  include <netinet/in.h>
#  include <arpa/inet.h>
#  include <unistd.h>
#  include <netdb.h>
#  include <sys/socket.h>
#  include <sys/un.h>
#  include <pwd.h>
#  include <grp.h>
#else
#  include "getopt.h"
#  include <stdarg.h>
#  pragma comment (lib, "wpcap.lib")
#endif /* ^WIN32 */

Error 1 fatal error C1083:开发者_开发百科 Cannot open include file: 'getopt.h': No such file or directory c:\filetry.c

getopt is not a visual c header. This might help: http://www.codeguru.com/forum/archive/index.php/t-393293.html