July 2008
Beginner to intermediate
272 pages
7h 40m
English
Content preview from Windows® Embedded CE 6.0 FundamentalsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Device Plug and Play Messaging System
Windows Embedded CE has a subsystem that is similar to the PnP messaging system of a desktop operating system. When the drivers are loaded, it can provide the system with the information about the classes supported by the device by using either a registry setting (IClass) or by calling the AdvertiseInterface() function directly. A device class is basically a predefined set of functionality implemented by the device.
For instance, DEVCLASS_STREAM_GUID is a regular stream interface driver and DEVCLASS_ CAMERA_GUID is a camera driver.
A messaging subsystem is implemented as part of the Device Manager subsystem. Their interaction is shown in Figure 8–25.
Figure 8–25. Plug and Play messaging system
Any driver or an ...
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