[DUG] Showing a modal screen while processing

[Robert Martin]

Hi

I have a class that I want to display a message while it is processing. 
  I want no user actions available while the processing occurs, the 
class will (always) remove the message on completion or failure.  I want 
it to look pretty too !

I wanted to pop up a modal form without the close buttons, however 
calling showmodal will pause the process and stop my class closing the 
screen.  In the past I have gotten around this by putting the processing 
code on the message screen itself, this isn't practical in this case.

The class is used in a number of places throughout my application.

What do people recommend I do / use?

Thanks
Rob