Printing - units

I am having a devil of a time if I stray from the simple print a text file. I cannot seem to find a good reference in how the print system works. I am trying to print something that looks a lot like a spreadsheet. The data comes from several SQL tables and quite a bit of calculation.

Right now I am having problems with the units. It I set a font size to say 10, by the time it gets to the printed page it is 19. When trying to print data in a column I cannot seem to pick a number that will print on the page. Rather than upload a ton of code, can anyone direct me to a document or book where I can read about the units and setting complex print jobs using VB .NET

Thanks in advance, Mike