How do I control printing from ASP?

Printing happens on the CLIENT. Therefore, you can only control anything to do with printing, from the client... and not from ASP. Changing margins, header & footer, hiding some things on your page from printing, forcing page breaks, and even initiating the printer at all are tasks that can only be accomplished from the CLIENT side. Please keep in mind that you can't (and shouldn't want to) FORCE the user to print your page, or do so without telling them (i.e. allowing them to confirm) that you're about to send data to your printer. 
 
This article does a good job of exposing print templates (assuming clients of IE 5.5+): 
 
    Print Templates, Part I - Doc JavaScript... 
 
Mead Co. provides an effective solution which adds the ability to control many of IE's printing features from scripting, such as headers/footers/margins/landscape: 
 
    http://www.meadroid.com/scriptx/index.as... 
 
HTMLPrinting.com also has a product that allows you to control printer settings: 
 
    HTML Printing - Home 
 
Heidi Housten demonstrates a way to invoke the Print dialog: 
 
    ~linkid(336, '', 'http://members.tripod.com/~housten/printing.html')~ 
 
You can hide things from printing by using a different style sheet setting for screen and print media types: 
 
    Media types 
 
And you can force a page break at certain points in your document: 
 
    Paged media 
 
A couple of other useful printing articles can be found here: 
 
    http://msdn.microsoft.com/workshop/autho... 
 
    CSS and Printing 
 
Now whether the 'other' browser is up to all these tasks is beyond me... and isn't really on-topic here. This is an ASP site, after all. :-)