ClearFeature

This function sends a CLEAR_FEATURE request to a USB device.

Syntax

USB_TRANSFER ClearFeature( USB_HANDLE hDevice, LPTRANSFER_NOTIFY_ROUTINE lpStartAddress,
LPVOID lpvNotifyParameter, DWORD dwFlags, WORD wFeature,
UCHAR bIndex );

Parameters

hDevice

[IN] Handle to a USB device.

lpStartAddress

[IN] Pointer to the address, which may be NULL, of a callback routine.

lpvNotifyParameter

[IN] Pointer to the parameter to pass to a callback routine.

dwFlags

[IN] Specify USB_NO_WAIT or 0, plus one of the following:

USB_SEND_TO_DEVICE

Request for device.

USB_SEND_TO_INTERFACE

Request for interface.

USB_SEND_TO_ENDPOINT

Request for endpoint.

wFeature

[IN] Feature selector; one of USB_FEATURE_* declared in the USB100.h header file.

bIndex

[IN] Specifies 0 for DEVICE, or interface/endpoint number.

Return Values

A USB_TRANSFER handle indicates success. NULL indicates failure.

Remarks

This function initiates a control transfer to a USB device, requesting that a specified feature be disabled.

This function is defined in the Mousedrv.cpp file.

See Also

AbortTransfer, GetTransferStatus, IsTransferComplete, SetFeature