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Working With HID Class Device Interfaces

This chapter provides step-by-step instructions, including listings of sample code, for accessing a HID class device on Mac OS X. These examples assume that you have already obtained an iterator for a list of devices matching certain properties (for example, by using the MyFindHIDDevices function, Listing 2-3).

Now that you have a device iterator, you can use it to examine each device and create a device interface for it. The functions in this chapter demonstrate this process by first displaying the properties and then creating and testing a device interface for each device in turn.

This chapter contains the following sections:

1. “Printing the Properties of a HID Class Device”

2. “Creating a HID Class Device Interface”

3. “Obtaining HID Cookies”

4. “Performing Operations on a HID Class Device”

5. “Using Queue Callbacks”

For code to help you locate HID class devices, see “HID Access Overview.”

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