There are suggestions in the Help documentation and on this site that indicate it is possible to attach files to a fillable PDF form that is being submitted. But I do not see any instructions for adding this functionality to a form. I am using Acrobat 9 Pro to create my form. I have a Submit button with an Action/Menu Item/Submit a form option, and the URL link for the submission is a local coldfusion file with a #FDF suffix. The export format is HTML. The form also contains a hidden EMAILTO field, with an Options/DefaultValue option identifying the recipient's email address. (I'm guessing the local cfm file uses this field.) There is also a hidden URL field in the form, and its Options/DefaultValue specifies the URL of the fillable form itself. (Perhaps the local cfm file uses this field too.)
How can I add functionality to this form, using Adobe/PDF, to allow the user who submits the form to attach a file to the submission?