#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>

#define DllExport __declspec(dllexport)
#define DllImport __declspec(dllimport)

typedef void (CALLBACK* dllfunc)(char *);

int
main (int argc, char *argv[])
{
  HINSTANCE h;
  dllfunc func;    // Function pointer

  if (argc < 3)
    {
      fprintf (stderr, "Usage: %s library string\n", argv[0]);
      return EXIT_FAILURE;
    }

  /* Open the library */
  h = LoadLibrary (argv[1]);
  if (h == NULL)
    {
      fprintf (stderr, "Unable to open library %s\n", argv[1]);
      return EXIT_FAILURE;
    }

  /* Find the library function */
  func = (dllfunc) GetProcAddress(h, "dllfunc");
  if (func == NULL)
    {
      fprintf (stderr, "Unable to find function dllfunc in library %s\n",
	       argv[1]);
      FreeLibrary (h);
    }

  /* Call the library function */
  func (argv[2]);

  /* Close the library */
  FreeLibrary (h);

  return EXIT_SUCCESS;
}

DllExport void
reverse_string (char *s)
{
  register int i, length = strlen (s);
  for (i = 0; i < length - i - 1; i++)
    {
      char temp = s[i];
      s[i] = s[length - i - 1];
      s[length - i - 1] = temp;
    }
}