package Ġorg . gui V ista . gui . widget . data Entry Ċ Ċ public Ġobject ĠSpin Button Event Ġ{ ĊĠĠĠ Ġpublic Ġconst Ġval Ġvalue Changed : ĠString Ġ= Ġ" value - changed " ĊĠĠĠ Ġpublic Ġconst Ġval Ġchange Value : ĠString Ġ= Ġ" change - value " Ċ } Ċ