Hi Kevin,
The attribute ids that are valid for the DAQmxSetTriggAttribute() are in the included NIDAQmx.h file. They can be found under the heading
"//********** Trigger Attributes **********"
Similarly, the attribute ids for the DAQmxSetBufferAttribute can be found under the heading
"//********** Buffer Attributes **********"
These attributes are each defined in the NIDAQmx.h file. The parameters given to the functions include the task, the attribute, and the value to assign the attribute.
I hope this helps!
Thanks,
Justin M.
National Instruments