Paul,
Usually a scope will be acquiring data at a fixed sampling rate and the time divition knob changes the amout of data that is shonw on the screen.
In DAQ programming the time divition knob will controll the number of samples taken at a time; that is the size of the DAQ buffer.
About the Pulse With knob, I'm not sure exactly what it does in the scope; What is it that you expect it to do in your code?
I hope this helps.
Regards,
Juan Carlos
N.I.