A "break-in event" is an event that causes IDF to break in to the target program's execution and regain control, even though a breakpoint was not reached. For example, you might need to cause a break-in event if your program is in an infinite loop that does not contain a breakpoint.

When IDF initially invokes your program, it establishes an ESTAE exit. If your program has not established its own ESTAE exit (which overrides the IDF ESTAE), IDF should receive control when the ATTENTION key is pressed.