SALV to PDF

Hi ,

I have developed a report using SALV ( OO ALV) . now i have a requirement where in the report should be exported as a PDF file. On searching in SDN I found that CONVERT_ABAPSPOOLJOB_2_PDF and GUI_DOWNLOAD should be used inorder to convert teh Spool request to PDF output. But in CONVERT_ABAPSPOOLJOB_2_PDF there is a parameter 'src_spoolid" to whcih the SPOOL ID shoudl be passed, How do i get teh spool ID?

Thanks,

Maansi