Thanks Cathy! That is just what I was looking for! Works like a charm.

David

>Here's what you do...
>
>1. Add a report variable called rnInvCount, set the value to zero, set the Calculate option to SUM, set the Reset point to End of report.
>
>2. In the OnExit Expression of the group footer band for the invoice, put the following:
>

>_VFP.SetVar('rnInvCount', rnInvCount+1)
>

>
>3. Use the logic of MOD(rnInvCount,2) = 0 (or the opposite) in your shading to determine whether to print the colored background.