SLaSH1Z 0 Newbie Poster

i need to write an app that take a Tax Invoice template (PDF)
and only changes(edit) the #number in a specific field every time and print it in number of copies .
i dont have much experience in programing but i think ill manage .

i read about ItextSharp and tried to understand how to do it .. but no luck ...the thing that i didnt understand is :
how to go to specific place in the pdf by default and replace the #number there to other number.

can anyone direct me to the solution ? explains and codes will be appreciated.

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