ChangerClassDeviceControl - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// mcd.h

NTSTATUS ChangerClassDeviceControl(
  [in] PDEVICE_OBJECT DeviceObject,
  [in] PIRP           Irp
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-mcd-changerclassdevicecontrol)

ChangerClassDeviceControl function

Description

The ChangerClassDeviceControl routine is called by a changer minidriver to allow the class driver perform device-independent aspects of a device control operation.

Parameters

DeviceObject [in]

Pointer to the device object of the device.

Irp [in]

Pointer to the I/O request packet (IRP) that initiated the device control operation.

Return value

If the operation succeeds, the ChangerClassDeviceControl routine returns STATUS_SUCCESS. Otherwise the routine returns one of the following status values.

Return code Description
STATUS_NO_SUCH_DEVICE The device object does not have a properly initialized device extension.
STATUS_INFO_LENGTH_MISMATCH The length of the output buffer indicated in the IRP is too small to hold the return data.
STATUS_BUFFER_TOO_SMALL The length of the input buffer indicated in the IRP is too small to hold the input data that is necessary to complete the operation.
STATUS_INVALID_PARAMETER The length of the input buffer is zero.

View the official Windows Driver Kit DDI reference

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