The IOCTL_INTERNAL_PARALLEL_SET_CHIP_MODE request sets the operating mode of a parallel port.
For more information, see Setting and Clearing the Communication Mode on a ParallelPort.
The AssociatedIrp.SystemBuffer member points to a PARALLEL_CHIP_MODE structure that the client allocates to input chip mode information. The client sets the ChipMode member to the requested operating mode.
Input Buffer Length
The Parameters.DeviceIoControl.InputBufferLength member is set to the size, in bytes, of a PARALLEL_CHIP_MODE structure.
Output Buffer Length
The Information member is set to zero.
The Status member is set to one of the generic status values returned by internal device control requests for parallel ports or to one of the following values:
|Header||parallel.h (include Parallel.h)|