IOCTL_INTERNAL_PARCLASS_CONNECT IOCTL (parallel.h)
The IOCTL_INTERNAL_PARCLASS_CONNECT request returns information about a parallel port and the callback routines that the system-supplied bus driver for parallel ports provides to operate the parallel port.
For more information, see Connecting to a Parallel Device.
Major code
IRP_MJ_INTERNAL_DEVICE_CONTROL
Input buffer
A PARCLASS_INFORMATION structure.
Input buffer length
The value of the Parameters.DeviceIoControl.OutputBufferLength member is set to the size, in bytes, of a PARCLASS_INFORMATION structure.
Output buffer
The AssociatedIrp.SystemBuffer member points to a PARCLASS_INFORMATION structure that the client allocates to output information.
Output buffer length
The size of a PARCLASS_INFORMATION structure.
Status block
If the request is successful, the Information member is set to the size, in bytes, of a PARCLASS_INFORMATION structure. Otherwise, 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 devices or to the following value:
STATUS_BUFFER_TOO_SMALL
The value of the Parameters.DeviceIoControl.OutputBufferLength member is less than the size, in bytes, of a PARCLASS_INFORMATION structure.
Requirements
| Requirement | Value |
|---|---|
| Header | parallel.h (include Parallel.h) |
See also
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