Eyelink('SendKeyButton')

Psychtoolbox>Eyelink.{mex*} subfunction

[result =] Eyelink('SendKeyButton', code, mods, state)

sends key/button state chane to tracker code = KB_BUTTON, mods = number for button state is KB_PRESS, KB_RELEASE, or KB_REPEAT Returns: OK_RESULT or LINK_TERMINATED_RESULT