Sorry to ask, but regarding the simple sample, I am not that familiar with ASP.NET and it would be much appreciate if you could post a complete example in an ASPX page. I pasted in the example code but I am not familiar enough with coding to get the VB code to work. I would just to see an example opening a PDF, filling a couple text fields, viewing the PDF, and then saving the PDF as another name afterwards.
Thanks for considering Aspose.Pdf.Form. The attachment is a simple asp.net project which is opening a PDF, filling a couple text fields, and then saving the PDF as another file.
Another complex project is in your installed demo directory, which is about bulk filling data from the database to the fields.