The JavaScript code to be executed. The method does nothing if
it is null/Nothing or empty.
options
The options. If it is null, a default will be used.
return
The result of the execution converted to string.
Notes
This method runs the JavaScript code against the PDF document.
For example, you can execute actions that are executed when an
annotation is clicked on by running the JavaScript code obtained
with doc.GetInfo(annot.ID, "/A/JS:Text").