Popdrawer can be used to pop up a standard system asl drawer requester. A separate task is spawned to handle the requesters, the application continues to run.
Popdrawer class will create a string gadget and a popup button for you. You don't need to worry about handling asl requesters. MUI will automatically open one when the popup button is pressed and update the corresponding string gadget when the user terminates the requester. From the programmer's point of view, all you have to do is to handle the string gadgets contents.