Echo win32

winecho.c

/*
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 3
    of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA  02110-1301, USA.

    Copyright (C) 2008, Tatsh
*/

/* A simple Win32 MessageBox implementation of ECHO. */

#include <windows.h>

int main(int argc, char *argv[]) {
  /* In Windows, it is impossible AFAIK to pass a NULL argument before a non-NULL argument. Therefore, do not check if both argv[1] and argv[2] are NULL. */
  if (argv[1] == NULL) {
    printf("No window title or message specified.\nUsage: %s <window title> <message>\n", argv[0]);
    return 1;
  }
  else if (argv[2] == NULL) {
    printf("No message specified.\nUsage: %s <window title> <message>\n", argv[0]);
    return 1;
  }
  else {
    /* Show the message box */
    MessageBox(0, argv[2], argv[1], MB_ICONINFORMATION | MB_OK);
    return 0;
  }
}