#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
 
void werror ( void )
{
  char msg[BUFSIZ];
  DWORD err = GetLastError();
 
  FormatMessage ( FORMAT_MESSAGE_FROM_SYSTEM, NULL, err,
    MAKELANGID ( LANG_NEUTRAL, SUBLANG_DEFAULT ), msg, BUFSIZ, NULL );
 
  fprintf ( stderr, "%s", msg );
  exit ( EXIT_FAILURE );
}
 
int main ( int argc, char *argv[] )
{
  BOOL rc;
 
  if ( argc < 2 ) {
    fprintf ( stderr, "usage: $prog <file>\n" );
    exit ( EXIT_FAILURE );
  }
 
  rc = SetFileAttributes ( argv[1],
    FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_READONLY );
 
  if ( rc == 0 )
    werror();
 
  return EXIT_SUCCESS;
}