Horizontal line in detail section of crytal report

hi,


i have VB and Reporting tool Crystal report
corresponding Records are printed,
like, i want horizontal lines printed 21 times

as if 2 records are printed then only 2 lines are printed and below is left out blank till end

if 8 records then 8 lines are printed and below is left blank till end

is there any option that 21 lines should be printed and in that records should be printed 2 or 5 or 10 ....

could any body sort out this pbm,

Thanks

I don't know Crystal Reports, doesn't the CR documentation tell you how to do this?