The different types of asl requesters are modal (as of V44). Yet at times it may be necessary to abort a modal requester from a different task context. AbortAslRequest() will attempt to tell the modal asl requester provided to shut down and perform as if the user had clicked on the requester's window close gadget. This may take some time to complete; be prepared to handle this.
INPUTS
requester
Requester obtained from AllocAslRequest(), or NULL in which case this function does nothing.