Printing in Adobe Air with css print media rule

I am new to air and I am having a big problem with printing, I got some come snippet that triggers printing but the main problem is that the <code>window.htmlLoader</code> is passed to the addPage() and the print renders a screeshot of the first page.

This is not what I want, I defines a media print style rule and I want the print to print some portion of the page regrding the print media rule, is there any option or help. I have a deadling, the programming with JS is not the problwm but the printing is the problem. Is there any better API that can streamline this, I am running out of time.

Thanks in advance