IOCTL_SERIAL_SET_TIMEOUTS control code
The IOCTL_SERIAL_SET_TIMEOUTS request sets the time-out values that the serial controller driver uses for read and write requests.
To get the time-out values, a client can use an IOCTL_SERIAL_GET_TIMEOUTS request.
For more information about time-outs, see Setting Read and Write Time-Outs for a Serial Device.
The AssociatedIrp.SystemBuffer member points to a client-allocated SERIAL_TIMEOUTS structure that is used to input read and write time-out values.
The Parameters.DeviceIoControl.InputBufferLength member is set to the size, in bytes, of a SERIAL_TIMEOUTS structure.
The Information member is set to zero.
The Status member is set to one of the Generic Status Values for Serial Device Control Requests. A status of STATUS_INVALID_PARAMETER indicates that the read time-out values exceed the maximum permitted values.