Edit PDF files by VB.net progaramming

Hi

i have tried itextsharp for putting watermark on pdfs. It worked fine.

Now i am trying to edit existing Header on pdf file to desired header.

Is it possible ?

if its possible then i have to try to use it on the bunch of pdf files in one single folder

Thanks for the help

Sri

Moved From The Codebank

Sorry i can not help with how to edit a pdf file but i believe you can if the pdf is editable as some are not.