INT 15 - VMiX - GET KEY FIELD OF QUEUED ELEMENT
AH = 0Fh
STACK:  WORD    queue ID (0 = process queue, 1 = object q, 3 = type q)
WORD    ID of element in queue chain
Return: AX = key

See also: 150A

150F - VMiX - GET KEY FIELD OF QUEUED ELEMENT