diff --git a/ncurses/tty/lib_twait.c b/ncurses/tty/lib_twait.c
index 15d07c3..6fa73ee 100644
--- a/ncurses/tty/lib_twait.c
+++ b/ncurses/tty/lib_twait.c
@@ -1,5 +1,6 @@
 /****************************************************************************
- * Copyright (c) 1998-2014,2015 Free Software Foundation, Inc.              *
+ * Copyright 2018-2020,2023 Thomas E. Dickey                                *
+ * Copyright 1998-2015,2016 Free Software Foundation, Inc.                  *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
@@ -70,13 +71,16 @@
 #  include <sys/select.h>
 # endif
 #endif
-#ifdef __MINGW32__
+#if HAVE_SYS_TIME_H
 #  include <sys/time.h>
 #endif
 #undef CUR
 
-MODULE_ID("$Id: lib_twait.c,v 1.70 2015/07/04 21:01:02 tom Exp $")
+MODULE_ID("$Id: lib_twait.c,v 1.81 2023/09/16 16:30:40 tom Exp $")
 
+/*
+ * Returns an elapsed time, in milliseconds (if possible).
+ */
 static long
 _nc_gettime(TimeType * t0, int first)
 {
@@ -84,18 +88,20 @@
 
 #if PRECISE_GETTIME
     TimeType t1;
-    gettimeofday(&t1, (struct timezone *) 0);
-    if (first) {
+    if (GetClockTime(&t1) == -1) {
+	*t0 = t1;
+	res = first ? 0 : 1;
+    } else if (first) {
 	*t0 = t1;
 	res = 0;
     } else {
 	/* .tv_sec and .tv_usec are unsigned, be careful when subtracting */
-	if (t0->tv_usec > t1.tv_usec) {
-	    t1.tv_usec += 1000000;	/* Convert 1s in 1e6 microsecs */
+	if (t0->sub_secs > t1.sub_secs) {
+	    t1.sub_secs += TimeScale;
 	    t1.tv_sec--;
 	}
-	res = (t1.tv_sec - t0->tv_sec) * 1000
-	    + (t1.tv_usec - t0->tv_usec) / 1000;
+	res = (long) ((t1.tv_sec - t0->tv_sec) * 1000L
+		      + (t1.sub_secs - t0->sub_secs) / (TimeScale / 1000L));
     }
 #else
     time_t t1 = time((time_t *) 0);
@@ -113,9 +119,9 @@
 _nc_eventlist_timeout(_nc_eventlist * evl)
 {
     int event_delay = -1;
-    int n;
 
     if (evl != 0) {
+	int n;
 
 	for (n = 0; n < evl->count; ++n) {
 	    _nc_event *ev = evl->events[n];
@@ -197,6 +203,10 @@
 
     long starttime, returntime;
 
+#ifdef NCURSES_WGETCH_EVENTS
+    (void) timeout_is_event;
+#endif
+
     TR(TRACE_IEVENT, ("start twait: %d milliseconds, mode: %d",
 		      milliseconds, mode));
 
@@ -350,7 +360,7 @@
     if ((mode & TW_MOUSE)
 	&& (fd = sp->_mouse_fd) >= 0) {
 	FD_SET(fd, &set);
-	count = max(fd, count) + 1;
+	count = Max(fd, count) + 1;
     }
 #ifdef NCURSES_WGETCH_EVENTS
     if ((mode & TW_EVENT) && evl) {
@@ -360,7 +370,7 @@
 	    if (ev->type == _NC_EVENT_FILE
 		&& (ev->data.fev.flags & _NC_EVENT_FILE_READABLE)) {
 		FD_SET(ev->data.fev.fd, &set);
-		count = max(ev->data.fev.fd + 1, count);
+		count = Max(ev->data.fev.fd + 1, count);
 	    }
 	}
     }