diff --git a/lib/isc/win32/ntfile.c b/lib/isc/win32/ntfile.c
new file mode 100644
index 0000000000..8830b1a11a
--- /dev/null
+++ b/lib/isc/win32/ntfile.c
@@ -0,0 +1,178 @@
+/*
+ * Copyright (C) 2001  Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
+ * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+ * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
+ * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+ * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* $Id: ntfile.c,v 1.1 2001/07/06 05:34:06 mayer Exp $ */
+
+/* This file has been necessitated by the fact that the iov array is local
+ * to the module, so passing the FILE ptr to a file I/O function in a
+ * different module or DLL will cause the application to fail to find the
+ * I/O channel and the application will terminate. The standard file I/O
+ * functions are redefined to call these routines instead and there will
+ * be just the one iov to deal with.
+ */
+
+#include <config.h>
+
+#include <io.h>
+
+FILE *
+isc_ntfile_fopen(const char *filename, const char *mode) {
+
+	return(fopen(filename, mode));
+}
+
+int 
+isc_ntfile_fclose(FILE *f) {
+
+	return(fclose(f));
+}
+int 
+isc_ntfile_fseek(FILE *f, long offset, int whence) {
+
+	return(fseek(f, offset, whence));
+}
+size_t 
+isc_ntfile_fread(void *ptr, size_t size, size_t nmemb, FILE *f) {
+
+	return(fread(ptr, size, nmemb, f));
+}
+
+size_t 
+isc_ntfile_fwrite(const void *ptr, size_t size, size_t nmemb, FILE *f) {
+	int r;
+	r = fwrite(ptr, size, nmemb, f);
+	fflush(f);
+	return(r);
+}
+
+int 
+isc_ntfile_flush(FILE *f) {
+
+	return(fflush(f));
+}
+
+int 
+isc_ntfile_sync(FILE *f) {
+
+	return(_commit(_fileno(f)));
+}
+
+FILE * 
+isc_ntfile_getaddress(int r) {
+	return (&_iob[r]);
+}
+
+int 
+isc_ntfile_fprintf(FILE *fp, const char *format, ...) {
+	int r;
+	va_list ap;
+	va_start(ap, format);
+	r = vfprintf(fp, format, ap);
+	va_end(ap);
+	fflush(fp);
+	return (r);
+}
+
+int 
+isc_ntfile_vfprintf(FILE *fp, const char *format, va_list alist) {
+	int r;
+	r = vfprintf(fp, format, alist);
+	fflush(fp);
+	return(r);
+}
+
+int
+isc_ntfile_fputc(int iv, FILE *fp) {
+	int r;
+	r = fputc(iv, fp);
+	fflush(fp);
+	return(r);
+}
+
+int
+isc_ntfile_fputs(const char *bf, FILE *fp) {
+	int r;
+	r = fputs(bf, fp);
+	fflush(fp);
+	return(r);
+}
+
+int
+isc_ntfile_fgetc(FILE *fp) {
+	return(fgetc(fp));
+}
+
+int
+isc_ntfile_fgetpos(FILE *fp, fpos_t *pos) {
+	return(fgetpos(fp, pos));
+}
+
+char * 
+isc_ntfile_fgets(char *ch, int r, FILE *fp) {
+	return(fgets(ch,r, fp));
+}
+
+int
+isc_ntfile_getc(FILE *fp) {
+	return(getc(fp));
+}
+
+FILE *
+isc_ntfile_freopen(const char *path, const char *mode, FILE *fp) {
+	return(freopen(path, mode,fp));
+}
+
+FILE *
+isc_ntfile_fdopen(int handle, const char *mode) {
+	return(fdopen(handle, mode));
+}
+/*
+ * open(), close(), read(), write(), fsync()
+ * sockets are file descriptors in UNIX.  This is not so in NT
+ * We keep track of what is a socket and what is an FD to
+ * make everything flow right.
+ */
+int 
+isc_ntfile_open(const char *fn, int flags, ...){
+	va_list args;
+	int pmode;
+	int fd;
+
+ 	/* Extract the cmd parameter */
+	va_start(args, flags);
+	pmode = va_arg(args, int);
+	fd = _open(fn, flags, pmode);
+	return fd;
+}
+
+int
+isc_ntfile_close(int fd){
+	return (_close(fd));
+}
+
+int 
+isc_ntfile_read(int fd, char *buf, int len) {
+	return (_read(fd, buf, len));
+}
+
+int
+isc_ntfile_write(int fd, char *buf, int len){
+	int r;
+	r = _write(fd, buf, len);
+	_commit(fd);
+	return(r);
+}