Manual > Control Reference > Common to all controls

Events that all controls have in common are called common events.

A semi-common event is an event that is shared by only a few controls.

Event name	explanation	script action	browser script	Arithmetic Expression syntax
OnInitialize	Occurs once, just before the control is displayed for the first time.	○	○	×
OnHeartBeat	An event that occurs periodically.	○	○	×
OnTagValueChanged	This occurs when the value of a tag registered with AddTag changes.	○	○	×
OnTerminate	This occurs once when the screen is closed.	○	○	×
OnTimer	Occurs when the timer runs out.	○	○	×
OnExpressionValueChanged	This occurs when the value of an expression registered with AddExpression changes.	○	×	×

Common Events