How do I add an "attach files" button in my PDF form?

From a document script you cannot actually attach a file to the PDF. The functions for doing this particular action are restricted to a privileged context. However, you can embedd a file into submitted FDF data.

1. Add a text field and a button field to the PDF.
2. Name the text field "FileSubmit",
3. On the options tab of the Text field properties dialog, check "Field is used for file selection".
4. Add this script to the MouseUp action of the button

this.getField("FileSubmit").browseForFileToSubmit();

5. Add a submit button to the form,
6. Set the button up to submit the data in FDF format. This is the only format that can embed file data.

This setup will allow the user to submit a file, embedded in the FDF data. The next task of course is for you to be able to extract the file from the FDF data. The Adobe FDF toolkit is a library of functions for manipulating FDF data. It comes in versions for Perl, VB, C++, and ASP. And it's FREE!! However, you'll have to write your own application, either desktop or server side.

Thom Parker
The source for PDF Scripting Info
[url=http://www.pdfScripting.com]pdfscripting.com[/url]

The Acrobat JavaScript Reference, Use it Early and Often
[url=http://www.adobe.com/devnet/acrobat/]http://www.adobe.com/devnet/acrobat/[/url]