h6. [[Programmer's Reference Manuals]] h6(. » [[Events]] h6((. » [[Event Numbers]] h6(((. » [[Event 21]] h6((((. » Expansion events |_<^{width:4em}. Reason |_<^. Description|_<^. Provider| |<^. 3|<^. PS2Event event|Cerilica| |<^. 4|<^. [[Event 21,4|Pointer scroll event]]|Select 4.32+| h4. Use A number of different events are available through sub-reason codes. h4. Notes Sub-reason code 4 is not available in RISC OS 5. h4. See also * [[Event 21]] * [[Event Numbers]] * [[Events Introduction]]