RIGOL DS1000D - Manual (Page 130)

RIGOL
Programming Guide for DS1000E, DS1000D Series 3-26
See the figure below.
7. Add an Event Structure and a While Loop as well as two buttons, one of the
buttons is used to control the start of waveform fetching, and the other one is to
stop capturing. See the figure below.
8. Right-click the “selector label” and choose “Edit Events Handled by This
Case” or “Add Event case” to add events respectively for each button. Press
“Start” to capture waveform and “Stop” to exit the program.