It would be easier to provide an example.. say if you wanted to display some alerts with icons on a popup.. the best thing to do would be to make a label to display the text like this label code:
Then make an indicator code like:
Then whenever you want to display your popup you'd set those two variables first (from whatever, buttons/flash/sdk) and use the menu command to display it, for instance:
Similarly you could have used switchbutton, byvar or any other means you see fit to set the contents of the variables with the data to be displayed. This could be useful for instance if you made a little outside application that monitors something and gives out alerts (in a popup in RR) -- specially useful if you don't want to go through the trouble of making your application support skins.