Content-Disposition change filename

Dear all,

With the rpObjectDescription structure, I can use the kRpObjFlag_Disposition flag to manipulate the http header and add a Content-Disposition tag. The http server response with a Content disposition tag, which includes a filename=“xxx” attribute.

Question: How can I change or manipulate this filename attribute? Where does the http server get this filename?

TIA,

Victor Oomens