How to Save Pdf file in a particular format

Hi Experts,

                    Can anybody tell me how to save a pdf file in a particular format,My requirement is i have a print button in webdynpro ,when ever user clicks on print ,adobe form is opened ,if user clicks on save .Form is saving with adobe form name .My requirement is it should be saved as ID NO.Date.Pdf  form lets Id is 0456 ,form should be saved as 0456.040614.pdf format, Thanks in Advance

Regards

Sandesh