Error on Inline

[p_e_t_e]

Hi everyone!
I am doing a thesis where I will be recording EEGs during the
presentation of some movies.
The paradigm is:
Documentary part 1
Ad 1
Ad 2
Ad 3
Documentary part 2
Ad 4
Ad 5
Ad 6
...
My question is how do I signal the beginning of each movie? I was
told
to use InLine with this code:

PreStim.OnsetSignalEnabled = True
PreStim.OnsetSignalPort = &H378
PreStim.OnsetSignalData = &H01

PreStim.OffsetSignalEnabled = True
PreStim.OffsetSignalPort = &H378
PreStim.OffsetSignalData = &H01

But it gives an error saying that left of "." must be an object,
structure or dialog.
Is there any other way to send a signal identifying the stimulus?
Thanks!

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