Displaying Working Icon on screen

Hi all,

I'm developing mainly on PDAs and I want to know how to display the icon that comes up when a process is taking a while. There is normally an icon that appears which lets the user know that something is working in the background (like a progress bar, but a square that just repeats some animation)

Is there an easy way to display this (is it part of a built-in function) or do you have to add your own icon and loop through the animation within a timer

Thanks in advance.

Kind Regards,

Grant.