The easiest way would be to go into XPression's Keyboard/GPI Mapping and, at the same action you would use to assign a keyboard shortcut, also edit the GPI assignment to add a RossTalk/SmartGPI number. You would also add a RossTalk/SmartGPI port under Hardware Setup -> GPI Boards.
You can then use the "GPI" command in Visual Logic to send the GPI number you assigned to the XPression.
James
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