Count not suppressed detail rows

Hello,

I am facing a problem with counting detail rows if not suppressed. What I try to do is to build a formula like this:

If suppress-condition = true Then 0 Else 1

Thus I could count all displayed elements. My problem is the instance that I have to use a WhilePrintingRecods formula for suppressing some unwanted details:

WhileprintingRecords;

sharedstringvararray str;

NOT ({InfoObject/0coorder}

INsharedstringvararray str)

Up to now I have not found a way to realize this If-them-else formula. Does anyone have an idea how to reach this goal?

Thanks all,

Uli