The configuration index to use if the select-configuration request with OriginalConfigurationValue fails. Usbccgp.sys uses OriginalConfigurationValue first for a select-configuration request. However, in Windows Vista and later versions of Windows, you can add the following registry values to specify the configuration to select: Registry Key Therefore, a client driver that controls a set of interfaces or an interface collection of the composite device cannot change the configuration that is initially set by Usbccgp.sys. The operating system does not allow this. Resetting the configuration of the device changes the configuration for all of the device's interfaces, not just the one that the client driver controls. Each interface or interface collection of a composite device is, in many respects, like a separate device that has its own physical device object (PDO). If Windows loads Microsoft-provided USB Generic Parent Driver (Usbccgp.sys) for a composite device, from that point forward, Usbccgp.sys is responsible for selecting the configuration of the device. The topic also describes how Usbccgp.sys handles select-configuration requests sent by a client driver that controls one of functions of a composite device.Ī USB composite device consists of multiple functions (functional devices) within a single USB device. This article provides information about registry settings that configure the way Usbccgp.sys selects a USB configuration.
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