Total pages in ALV printout.

I have an ALV list/grid which needs to be printed with a header containing something like:

Page 1 of 30

I'm able to get the page numbers correctly from SY-PAGNO in the top of page event. However, getting the total (maximum) pages seems to be quite difficult. Has anyone sucessfully done this before in ALV?

Any help/suggestions would be much appreciated!

- Suresh Vijay