IOCTL_PAR_QUERY_RAW_DEVICE_ID IOCTL (ntddpar.h)
The IOCTL_PAR_QUERY_RAW_DEVICE_ID request returns a raw device ID, which includes the following: a two-byte prefix that specifies the size, in bytes, of the device's IEEE 1284 device ID; the IEEE 1284 device ID; and a NULL terminator.
Major code
Input buffer
None.
Input buffer length
None.
Output buffer
The AssociatedIrp.SystemBuffer member points to a buffer that the client allocates to output a raw device ID. The buffer contains the following contiguous sequence of information: a two-byte prefix that specifies the size, in bytes, of the device's IEEE 1284 device ID; the device ID; and a NULL terminator.
Output buffer length
The Parameters.DeviceIoControl.OutputBufferLength member specifies the size, in bytes, of the output buffer that can hold the following: a two-byte prefix that specifies the size, in bytes, of the device's IEEE 1284 device ID; the device ID; and a NULL terminator. An IEEE 1284 device ID can be up to 64 KB in size.
Status block
If the request is successful, the Information member is set to the size, in bytes, of the information returned in the output buffer. Otherwise, the Information member is set to zero.
The Status member is set to one of the generic status values returned by device control requests for parallel devices or to one of the following values:
STATUS_BUFFER_TOO_SMALL
The output buffer that AssociatedIrp.SystemBuffer points to is less than the size, in bytes, of a two-byte prefix, the IEEE 1284 device ID, and a NULL terminator.
STATUS_IO_DEVICE_ERROR
A device I/O error occurred.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddpar.h (include Ntddpar.h) |
See also
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