Justy,

In Help About I see Adobe Acrobat 4.0 in big letters and above in small letters
4.05a. It also installes Acrobat Distiller and Acrobat Catalog. I really don't know, how can I help you. I may send you this DLL, but it should be properly registred in order to work... Check other DLLs, which you have. Perhaps they contain some functions, which could be used similar...

>Dear Nadya,
>
>I have already full install the Acrobat 4.0! But I can't find the PDFMON.DLL, are you using V4.0? And Can I set the PDF file security to not allow to change document. I can change the file when I use Acrobat Program. Thanks a lot!
>
>Hope anyone have any idea or suggestion to share with me!
>
>Best Regards,
>
>Justy Chow