=== modified file 'src/com/goldencode/p2j/ui/client/driver/swing/WinKeyboardReader.java'
--- src/com/goldencode/p2j/ui/client/driver/swing/WinKeyboardReader.java	2015-10-14 13:31:31 +0000
+++ src/com/goldencode/p2j/ui/client/driver/swing/WinKeyboardReader.java	2016-01-14 18:27:15 +0000
@@ -32,11 +32,17 @@
 ** 009 VIG 20150818 Added ALT key support for menus keys navigation mode.
 ** 010 SBI 20151008 Improvements to support better GUI key processing compatibility.
 ** 011 SBI 20151014 Auto-repeats are fixed.
+** 012 SBI 20160114 Fixed the internal keyboard state to be consistent that happens due to this
+**                  keys combination ALT + TAB is intercepted by the operating system.
 */
 
 package com.goldencode.p2j.ui.client.driver.swing;
 
+import java.awt.AWTEvent;
+import java.awt.Toolkit;
+import java.awt.event.AWTEventListener;
 import java.awt.event.KeyEvent;
+import java.awt.event.WindowEvent;
 
 import com.goldencode.p2j.ui.*;
 import com.goldencode.p2j.ui.client.event.*;
@@ -56,7 +62,23 @@
       xlate.put(KeyEvent.VK_ESCAPE, Key.VK_ESCAPE);
       
       // ALT is not processed by 4GL... => Processed as menubar activation key.
-      xlate.put(KeyEvent.VK_ALT, 1024); 
+      xlate.put(KeyEvent.VK_ALT, 1024);
+      // added to process OS intercepted keys
+      Toolkit.getDefaultToolkit().addAWTEventListener(new AWTEventListener()
+      {
+         @Override
+         public void eventDispatched(AWTEvent event)
+         {
+            if (event.getID() == WindowEvent.WINDOW_DEACTIVATED)
+            {
+               if (!keyDownEvents.isEmpty())
+               {
+                  keyDownEvents.clear();
+               }
+            }
+         }
+      }, AWTEvent.WINDOW_EVENT_MASK);
+
    }
 
    /**