how to refer to control name in crystal report

Dear All

I'm trying to write code in crystal report Viewer and I can not refer to control in the detail Section in crystal report

I'm using this code

Code:

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Imports CrystalDecisions.CrystalReports.Engine
Private Sub CrystalReportViewer1_Load(sender As Object, e As EventArgs) Handles CrystalReportViewer1.Load
        Dim CR As New ReportDocument
        CR.Load("E:\CURRENT\VB.Net Applications\Tenders\TendersCurrent.rpt")
        Dim MaxHt As Single
        MaxHt = CR.Sections("Detail").ReportObjects("Remarks").Height
    End Sub

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I can not refer to the Remarks Field in the Detail Section in the Report, What is missing in the syntax to refer to this control

Your help is highly appreciated

Thanks, Regards

Moheb Labib