Improve callbacks documentation.
Improve callbacks documentation.

dsuess/winsparkle,nickdademo/winsparkle,nickdademo/winsparkle,drizt/winsparkle,alamaison/winsparkle,drizt/winsparkle,dsuess/winsparkle,bristol-instruments/winsparkle,alamaison/winsparkle,Herve-M/winsparkle,artillery/winsparkle,CaptainJackJJ/SmpUpdater,artillery/winsparkle,CaptainJackJJ/SmpUpdater,Herve-M/winsparkle,bristol-instruments/winsparkle