diff -up ./Fl.cxx.b5111 ./Fl.cxx
diff -up ./Fl_win32.cxx.b5111 ./Fl_win32.cxx
--- ./Fl_win32.cxx.b5111	2014-05-23 13:11:10.341222221 +0200
+++ ./Fl_win32.cxx	2014-05-28 11:28:36.791545786 +0200
@@ -652,9 +652,20 @@ static HWND clipboard_wnd = 0;
 static HWND next_clipboard_wnd = 0;
 
 static bool initial_clipboard = true;
+void fl_clipboard_notify_target(HWND wnd);
 
 void fl_clipboard_notify_change() {
-  // No need to do anything here...
+  // untarget clipboard monitor if no handlers are registered
+  if (clipboard_wnd != NULL && fl_clipboard_notify_empty())
+  {
+    fl_clipboard_notify_untarget(clipboard_wnd);
+    return;
+  }
+
+  // if there are clipboard notify handlers but no window targeted
+  // target first window if available
+  if (clipboard_wnd == NULL && Fl::first_window())
+    fl_clipboard_notify_target(fl_xid(Fl::first_window()));
 }
 
 void fl_clipboard_notify_target(HWND wnd) {
@@ -983,8 +994,7 @@ static LRESULT CALLBACK WndProc(HWND hWn
 
   case WM_CLOSE: // user clicked close box
     Fl::handle(FL_CLOSE, window);
-    PostQuitMessage(0);
-    return 0;
+    break;
 
   case WM_SYNCPAINT :
   case WM_NCPAINT :
@@ -1367,12 +1377,11 @@ static LRESULT CALLBACK WndProc(HWND hWn
     return 0;
 
   case WM_CHANGECBCHAIN:
-    if ((hWnd == clipboard_wnd) &&
-        (next_clipboard_wnd == (HWND)wParam)) {
+    if ((hWnd == clipboard_wnd) && (next_clipboard_wnd == (HWND)wParam))
       next_clipboard_wnd = (HWND)lParam;
-      return 0;
-    }
-    break;
+    else
+      SendMessage(next_clipboard_wnd, WM_CHANGECBCHAIN, wParam, lParam);
+    return 0;
 
   case WM_DRAWCLIPBOARD:
     // When the clipboard moves between two FLTK windows,
@@ -1847,7 +1856,10 @@ Fl_X* Fl_X::make(Fl_Window* w) {
   x->next = Fl_X::first;
   Fl_X::first = x;
 
-  fl_clipboard_notify_target(x->xid);
+  // Setup clipboard monitor target if there are registered handlers and
+  // no window is targeted.
+  if (!fl_clipboard_notify_empty() && clipboard_wnd == NULL)
+    fl_clipboard_notify_target(x->xid);
 
   x->wait_for_expose = 1;
   if (fl_show_iconic) {showit = 0; fl_show_iconic = 0;}