IOCTL_CHANGER_GET_PARAMETERS IOCTL (ntddchgr.h)
Returns the parameters of the device.
Major code
Input buffer
None.
Input buffer length
None.
Output buffer
The driver returns the GET_CHANGER_PARAMETERS data in the buffer at Irp->AssociatedIrp.SystemBuffer.
Output buffer length
Parameters.DeviceIoControl.OutputBufferLength in the I/O stack location indicates the size, in bytes, of the parameter buffer, which must be >= sizeof(GET_CHANGER_PARAMETERS).
Status block
The Information field is set to the number of bytes returned. The Status field is set to STATUS_SUCCESS, or possibly to STATUS_INFO_LENGTH_MISMATCH or STATUS_INSUFFICIENT_RESOURCES.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddchgr.h (include Ntddchgr.h) |