Count the number of pages in a report

Hi,

I have a developed a report with some scenarios... Some times the report has 3 pages and some times it has 5 pages depends upon the scenario. But I want to print the page no as follows...

If the report contains 3 pages, I want to display the page no as follows

Page : 1 of 3
Page : 2 of 3
Page : 3 of 3

If the report contains 5 pages, I want to display the page no as follows
Page : 1 of 5
Page : 2 of 5
Page : 3 of 5
Page : 4 of 5
Page : 5 of 5

Can you please assist me how to count the number of pages in the generated report.
Thanks in advance
Pralash