First, thanks for the answers.

What I am trying to accomplish is editing a document template via a software I am developing, and that is all. C# is probably the language that I am going to use.

I am supposing that the editable parts are fixed in the document. Thus, the thing is that I just wanted to know what is the best way to mark these parts, so I can locate/edit them later via programming.

Also, I am open to sugestions on how to produce this customizable fields for tables an images. I will take a look at VBA, but since I am expecting to use C# I don't know if it will fit my needs.

Thanks again!