A Boolean property. An expression which, if evaluated to be True, will show the message box on the webroutine page.
true() (that is, the message box will always be shown)
This example will show the message box if field #SHOW_MESSSAGES is equal to 'Y'. The expression should be entered, and is shown when the property has focus, as follows:
When the property loses focus, the expression is shown as follows: