public void setVisible(boolean visible) 
	{
        //
        // Centering About windows 
        //
        if (visible && fWhichAbout != kMessageReceived)
            ComponentUtil.centerComponent(this, fParentFrame.getLocation(), fParentFrame.getSize());
        //
        // Restore / Save the location of Message Received Dialog.
        //
        if (fWhichAbout == kMessageReceived) {
            if (visible) 
                ComponentUtil.fitComponentIntoScreen(this, fPropertiesDB.getRcvDialogLocation());
            else {
                fPropertiesDB.setRcvDialogLocation(getLocation());
                fPropertiesDB.saveProperties(new ActionEvent(this, ActionEvent.ACTION_PERFORMED, ""));
           	}
    	}
        //
        // Update memory usage if necesary
        //
        if (visible && fWhichAbout == kSystemProperties)
            updateMemoryInformation();
            
        super.setVisible(visible);
 	}