IOCTL_CANCEL_IO IOCTL

Description

Cancels activity on the specified USB transfer pipe that is associated with the specified device handle.

Parameters

Major code

Input buffer

Pointer to a location containing a value of type PIPE_TYPE.

Input buffer length

Size of the input buffer.

Output buffer

NULL.

Output buffer length

Zero.

Input/output buffer

Input/output buffer length

Status block

Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Otherwise, Status to the appropriate error condition as a NTSTATUS code.

Remarks

DeviceIoControl Parameters

hDevice

Device handle, obtained by calling CreateFile.

dwIoControlCode

IOCTL_CANCEL_IO

lpInBuffer

Pointer to a location containing a value of type PIPE_TYPE.

nInBufferSize

Size of the input buffer.

lpOutBuffer

NULL

nOutBufferSize

Zero.

lpBytesReturned

Pointer to a location to receive the number of bytes returned.

lpOverlapped

Optional pointer to an OVERLAPPED structure (described in the Microsoft Windows SDK documentation).

When the DeviceloControl function is called with the IOCTL_CANCEL_IO I/O control code, the caller must specify one of the PIPE_TYPE-typed values as the function's lpInBuffer parameter. This value indicates on which of the transfer pipes (interrupt, bulk IN, bulk OUT) the operation should be performed. For more information, see Accessing Kernel-Mode Drivers for Still Image Devices.