Justy,

if you want to start using security on a pdf-file than you should not create it with the PDF-Writer but with the Distiller. This program is part of Acrobat 4. Acrobat 3 has this program as well but the security option is not present in this version).

What you need to do is the following:
- print the document as a postscript file (!)
- start Distiller
- make sure you have set the security options in the folder where Distiller is looking in
- let Distiller create the file

If all is well than the created pdf has security. You can indicate what type of security is required: viewing, printing, editing.

I do this with a VFP program and it works like a charm.

Regards,

Ron Brahma

>Dear Mark,
>
>I think that I haven't descript not detail and clear. When I using your PDF coding to product a PDF file and send to customer. Customer can change the document if they have installed the Acrobat 4.0. It is because Acrobat 4.0 can insert or modify the content of PDF file and look at the document info which allow to change docment. In my case, I must make sure that customer cannot change the document due to company policy. If they can change the document content, they can claim the fault and try to break the agreement. Please give me some hints/suggestion, thank you very much .....
>
>Best Regards,
>
>Justy Chow