- Hewlett-Packard Printer User Guide

Using the VPO Application Programming Interfaces
The VPO Interfaces
Chapter 4 187
Figure 4-8 Communication With the Display Manager
Display Manager
Inst 1
Inst 2
Interface
Interface
Action Manager
GUI
Display
me
me
me
me
arsp
ctrlq
meq
meq
arspq
Apply for functionality
update config
me
configured
?
arsp
configured
?
update config
arsp
VPO
init()
arsp
Key:
me = Message Event
meq = Message Event Queue
arsp = Application Response
arspq = Application Response
Receiver
Interface
Application
Instance 1
Instance 2
(opcif_open())