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GetStatus

  • [アーティクル]

This function sends a GET_STATUS request to a USB device.

USB_TRANSFER GetStatus(
  USB_HANDLE hDevice,
  LPTRANSFER_NOTIFY_ROUTINE lpStartAddress,
  LPVOID lpvNotifyParameter,
  DWORD dwFlags,
  UCHAR bIndex,
  LPWORD lpwStatus 
);

Parameters

  • hDevice
    [in] Handle to a USB device.

  • lpStartAddress
    [in] Pointer to a callback routine, which may be NULL.

  • lpvNotifyParameter
    [in] Pointer to the parameter to pass to a callback routine.

  • dwFlags
    [in] Value of USB_NO_WAIT or zero (0), and one of the values from the following table.

    Value Description
    USB_SEND_TO_DEVICE Request for status of the device.
    USB_SEND_TO_INTERFACE Request for status of the interface.
    USB_SEND_TO_ENDPOINT Request for status of the endpoint.

  • bIndex
    [in] Value of zero (0) for DEVICE, or interface or endpoint number.

  • lpwStatus
    [out] Device's status.

Return Values

A USB_TRANSFER handle indicates success. NULL indicates failure.

Remarks

This function initiates a control transfer to a USB device requesting device, interface, or endpoint status.

Requirements

OS Versions: Windows CE 2.10 and later.
Header: Usbd.hpp.

See Also

AbortTransfer | GetStatus | GetTransferStatus | IsTransferComplete | USB Drivers

 Last updated on Tuesday, May 18, 2004

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