open and edit word document through form application

Question

Below i attached my project, where i want to open a document file(which is also attached) with read and write access, by clicking open button and "EditDocument" form will also open. whatever i will write in textbox1 in "EditDocument" form, it will replace it with "Name" in word document.
textbox2.text will replace it with "Address" in word document.
textbox3.text will replace it with "Qualification" in word document.

"It will act like find and replace option in office2007".
can onyone help me on this problem.