Synchronizes the behavior of several Zorro instances, f.i. for preventing that they write into the same file at the same time (Zorro S only). If another Zorro has called lock() before, this function waits until it either calls unlock() or the [Stop] key was pressed. In the latter case lock() returns 0, otherwise nonzero.
Cancels a previous lock call and let other waiting Zorros continue.
lock(); // prevent that other Zorros write into same file
timer, run, wait,
suspended, quit, version