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Getting Interface Descriptors

The USBGetInterfaceDescriptor function returns a pointer to the interface descriptor of supplied device reference.

OSStatus USBGetInterfaceDescriptor (
                     USBInterfaceRef *interfaceRef,
                     USBInterfaceDescriptor *InterfaceDescriptor,
                     UInt32 size);
--> interfaceRef
A pointer to the allocated interface reference for which you want the interface descriptor.
<-- interfaceDescriptor
A pointer to the device interface descriptor.
--> size
Size of the descriptor. If the descriptor that is returned is larger than the requested size, a kUSBOverRunErr is returned and only the first size bytes of the descriptor are filled in.
© 1999 Apple Computer, Inc.

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