help with crystalReport

[s-galit]

hi,
i have a formula parameter in my crystalReport
how can i initalize the parameter so that in every line in the
crystalReport the parameter will have a different string?
how to get to line in crystalReport?
thanks
thats what i have wrote till now but im getting in my field only "-" (in
every line)

For i = 0 To 9
dim temp as string=nameOfVariable
If temp.Equals("+") Then
report.DataDefinition.FormulaFields(0).Text = "'+'"
ElseIf temp.Equals("-") Then
report.DataDefinition.FormulaFields(0).Text = "'-'"
end if
next