Microsoft Windows CE 3.0  

IOCTL_HID_POLL

Important:
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This control code requests the HID class driver to poll a device for status.

Parameters

hDevice
Handle to the HID class device.
dwIoControlCode
IOCTL_HID_POLL
lpInBuffer
NULL
nInBufferSize
Not used
lpOutBuffer
NULL
nOutBufferSize
Not used.
lpBytesReturned
Not used.
lpOverlapped
NULL

Remarks

This I/O control code is not strictly necessary for the Windows CE HID class driver, because USB device status is collected automatically by the USB host controller driver (HCD). This I/O control code is defined in Windows CE only for compatibility with Windows NT. Processing for this code can simply return success without doing any work.

Requirements

Runs on Versions Defined in Include Link to
Windows CE OS 1.0 and later      
Note   This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.


 Last updated on Tuesday, July 13, 2004

© 2004 Microsoft Corporation. All rights reserved.