Used to ensure that a compiled job is in the correct
state to be run or validated.
Syntax
JobHandle = DSPrepareJob(JobHandle)
JobHandle is the handle,
as returned from DSAttachJob(), of the job to be prepared.
JobHandle is
either the original handle or a new one. If returned as 0, an error occurred
and a message is logged.
Example
h$ = DSPrepareJob(h$)