Use a Variable in Vb to pass Text to CR

Hi to all:

Sory to came again here in the forum,but I had no found posts,after search,with my problem...
I want to pass text in a variable named "StringA" from VB to a formula in CR and I have this:

Code:

---

Dim Report As New CRAXDRT.Application
Dim Rpt As CRAXDRT.Report
Dim formula As CRAXDRT.FormulaFieldDefinition


stringA = "January"

Set Report = New CRAXDRT.Application
Set Rpt = Report.OpenReport("D:\Projectos VB\NORWIN\Norwin\decl.iva.rpt")

Rpt.FormulaFields.Item(1).Text = ["stringA"]

---

1. I don't Know if the Syntax is correct - ....["stringA"]

2.I need to declare some variable...how?



Thanks in advance