Index: sched.c
--- sched.c.orig
+++ sched.c
@@ -110,6 +110,10 @@ calctimo()
   return min;
 }
 
+#ifdef IPC_EXPORT_IMAGE
+ extern struct window *windows;
+#endif
+
 void
 sched()
 {
@@ -121,6 +125,11 @@ sched()
 
   for (;;)
     {
+#ifdef IPC_EXPORT_IMAGE
+      /* export image from last used window which is on top of the list */
+      CopyWinImage( windows, shm );
+#endif
+
       if (calctimeout)
 	timeoutev = calctimo();
       if (timeoutev)