IOCTL_SERIAL_GET_COMMSTATUS IOCTL (ntddser.h)
The IOCTL_SERIAL_GET_COMMSTATUS request returns information about the communication status of a serial device. For more information about the status information that is retrieved by this request, see SERIAL_STATUS.
Major code
Input buffer
None.
Input buffer length
None.
Output buffer
The AssociatedIrp.SystemBuffer member points to a client-allocated SERIAL_STATUS structure that the serial controller driver uses to output communication status information.
Output buffer length
The Parameters.DeviceIoControl.OutputBufferLength member is set to the size in bytes of a SERIAL_STATUS structure.
Status block
If the request is successful, the Information member is set to the size in bytes of a SERIAL_STATUS structure. Otherwise, the Information member is set to zero.
The Status member is set to one of the Generic Status Values for Serial Device Control Requests.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddser.h (include Ntddser.h) |