All PutEvent modifiers must be used after the Stream driver has initiated and before it has terminated. TD_Unavailable is returned when a modifier cannot be used.
The following table lists modifiers that are used with the PutEvent function of the Connection object to modify the Rate and Periodicity values of the Stream driver in the middle of the stream job.
|Event||Expected Input Data|
|TD_Evt_UserCommand||A character buffer containing 9
bytes of data used to pass the user command.
User Command Syntax
The commands and values are case-insensitive.
Invalid user commands or specified values:
Invalid multiple RATE or PERIODICITY commands:
For usage examples of the TD_Evt_UserCommand, see Stream Driver Private Logs for TD_Evt_UserCommand.