Set security method to "No security" (allow export, printing etc.)

The short answer is No. This cannot be done with Acrobat JavaScript.

To do this sort of thing you would need one of the Adobe PDF servers or a plug-in.

Thom Parker
The source for PDF Scripting Info
[url=http://www.pdfScripting.com]pdfscripting.com[/url]

The Acrobat JavaScript Reference, Use it Early and Often
[url=http://www.adobe.com/devnet/acrobat/javascript.php]http://www.adobe.com/devnet/acrobat/javascript.php[/url]

Is there any way to tell that the pdf has other options than "no security" set? The problem is that my vb6 program hangs because an invisible message box is displayed i Acrobat. But as the user don't see Acrobat and the messagebox, the user cannot dismiss it and the system hangs!

Yes, the document object has a "securityHandler" property. This property will return null if there is no security on the PDF

if(this.securityHandler != null)
app.alert("This document has security and may require password entry");

Thom Parker
The source for PDF Scripting Info
[url=http://www.pdfScripting.com]pdfscripting.com[/url]

The Acrobat JavaScript Reference, Use it Early and Often
[url=http://www.adobe.com/devnet/acrobat/javascript.php]http://www.adobe.com/devnet/acrobat/javascript.php[/url]