Executes after a page is initialized and run.
This trigger executes after the OnInit Trigger.
You use the OnOpenPage trigger to change dynamic properties, including those which can only be changed when the page is opened, such as the Visible Property. You can also write to the database from the trigger.
If an error occurs in the trigger execution, then the page closes.
If you use the LOCKTABLE Function (Record) in the OnOpenPage trigger, then the table lock will be released when the trigger completes execution and not when the user closes the page.