The following screenshot shows the Report Designer's Report triggers available in a report:

Descriptions for the Report Triggers follow:

• Documentation(): Documentation is technically not a trigger because it can hold no executable code. It will contain whatever documentation we care to put there. There are no format restrictions.
• OnInitReport(): This executes once when the report is opened.
• OnPreReport(): This executes once after the Request Page completes. All the DataItem processing follows this trigger.
• OnPostReport():This trigger executes once at the end of all of the other report processing, if the report completes normally. If the report terminates with an error, this trigger does not execute. All the DataItem processing precedes this trigger.