Gui busy pop up
<p>I have a gui. When I press a button my gui interacts with a software. It takes some seconds. During this time I want a dialog box, pop up or some thing like that to appear infront of  my gui which tells the user to wait (with a message). When interaction of gui with software finishes the pop up automatically closes and user can again normally interact with gui.</p>

<p>Is there any way to do that ?</p>
