System form UDF

i want to catch an event on click on udf in a system form.
how i will catch...
how i will get item id for udf in system form.
oForm = SBO_Application.Forms.ActiveForm
oedit2 = oForm.Items.Item("U_EmpCode").Specific() <---- Error
or simply i want to assign value in udf... but i got error.
Regard,
Avijit

If pVal.FormType = "-60100" And pVal.BeforeAction = False And pVal.EventType = SAPbouiCOM.BoEventTypes.et_FORM_LOAD Then
            Try
                Dim oedit2 As SAPbouiCOM.EditText
                oForm = SBO_Application.Forms.ActiveForm
                oedit2 = oForm.Items.Item("U_EmpCode").Specific() <----
            Catch ex As Exception
                MsgBox(ex.Message)
            End Try
            ' oedit2 = oForm.Items.Item("U_EmpCode").Specific()
        End If
petr ,
i have udf in employee master date.
but still it is through error....

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Edited by: Mohana Annadurai on Feb 20, 2009 5:28 AM

Hi,
This is not UDF in system form.That is , the itemcode,itemname,qty,warehouse field in the content tab of the sales quotation form.when i change the field to editable and noneditable,
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