add a digital signature to a document without displays the Signatures dialog box?

Hi,

I am trying to do a web application, the idea is:

1 user upload a file (word, powerpoint etc)

2. the server side receive it and sign a signature with the user's information on it.

I want to save the digital certificate for each user on the server side so that users do not need to choose which certificate they use. But it seems that the methodSignatures.Add will displays theSignatures dialog box and I have to choose a digital signature manually to a document. Is there anyway to add the signature without showing the signatures dialog box? (e.g. my certificate is already saved on the server, so I use a method like Singatures.addMycertificate("certificate1") )

Many Thanks

Jerry

[766 byte] By [daxu] at [2007-12-23]