Registers a procedure handler to call when the named event occurs. The event is either error or actionpoint.

When tvscript calls an event handler procedure, it passes one argument to it. This argument contains a list that you must convert into an array.

When any error occurs, the array has the following indices:

event—The event, which is set to error

process_id— The ID of the process that hit the action point

thread_id—The ID of the thread that hit the action point

error_message—A message describing the error that occurred

When any action point is hit, the array has the following indices:

event—The event, which is set to actionpoint

process_id—The ID of the process that hit the action point

thread_id—The ID of the thread that hit the action point

actionpoint_id—The ID of the action point that was hit

actionpoint_source_loc_expr—The initial source location expression used to create the action point