NotificationResponseAction.Caption
From Xojo Documentation
Property (As String )
aNotificationResponseAction.Caption = newStringValue
or
StringValue = aNotificationResponseAction.Caption
New in 2020r2
Supported for all project types and targets.
or
StringValue = aNotificationResponseAction.Caption
New in 2020r2
Supported for all project types and targets.
The caption of the button for the action.