How to create waiting window ( like dialog box )
<p>In my application i need to send some information to server. 
This action take time - and i want to show some 'waiting sign' in the meanwhile. 
In the main Activity i dont have any place to add progess bar that will show the 'waiting' - so i want to pop up something like dialog box that will show the waiting process. </p>

<p>How to pop up / create this dialog box ( light box ) ? </p>
