Sending Output Buffer contents to PDFLib

Heya guys, I've just started to play with PDFLib v3 and was primarily experimenting to enable me to produce PDF versions of our HTML files on demand. I.e., like some sites have a 'Print this article' button, I want a 'Make a PDF' button. I played with PDFLib and saw that to get text on the page you can use several functions (like PDF_show...) however I was wondering if I can avoid having to write a specific module for each type of PDF file I want to make. My pages I want to produce as PDF can have complex tables, pictures and lots of text. Is there anyway I can send the contents of say the output buffer containing a completed <HTML>...</HTML> document to PDFLib or ClibPDF? Like the way in the full Adobe Acrobat 4 software the 'Open Web Page' function. Thanks in advance, Matty.