I am working on a delphi application where I need to be able to edit existing PDF form and drop PDF form fields interactively on the file.

Form fields like drop down, text, multi line text, radio button. Currently I am using ActiveX controls to open PDF files in an Delphi application.

However I can only read the PDF form but I want to be able to edit it also like drop an form field.

The idea is to add Form form on an existing PDF form and save it.I have tried Gnostice, PowerPDF but they do not allow interactively modify the PDF files like ADOBE.This online application PDFEscape allows us to create new and edit existing PDF forms interactively.