Print Dialog on Document Open (PDF)

I need to get the print dialog showing up when a pdf file is opened.

I found an example of what I need but I can't find the way to do it... anyone could help?

Here's the example: http://www.fpdf.org/en/script/ex36.pdf

Help would be greatly appreciated!
Art.

 

In adobe acrobat (not reader) click Advanced>Document Processing>Document Javascripts...

Type a new script name and click Add.

Then add the following code and delete everything else.

print(true);


Then click OK and save your document.