Printing on preprinted paper...

Question

Hi guys 
I need to do is just fill with values a sheet of paper, the user will fill the textboxes in the ASP.NET application and then i will call the application to print the format, But the thing is that the format is already done, I mean its an official paper so i cant print it again with the values.
Now imagine that this is the official format, the size is LETTER:

Sample Form
First Name	:--------------------
Last Name	:--------------------

NOW the user will fill the values in the application and HE will print it and it has to appear like this:

Sample Form
First Name	Suman
Last Name	P

I can do this just recreating the format but i cant because the sheet of PAPER IS OFFICIAL SO I JUST WANT TO FILL THE SHEET WITH VALUES FROM THE PRINTING OF THE APPLICATION.
Hope you cguys can help me with this.