Return customer object based on Custom field search

Hi,

I am trying to do a customer search based on a custom customer field(custentity13).  The custom field is an integer field.  I'm working with VB.net, basically I want the customer object if the value in the custom field exists in the customer records.  Here's what I'm attempting, but it is returning nothing as the search result, any help is appreciated!:


Function Customer_Exists(ByRef oService As netsuite.webservices.NetSuiteService, ByVal strCustID As String, ByRef oCustomer As netsuite.webservices.Customer) As Boolean

        Dim cs As New netsuite.webservices.CustomerSearch, csb As New netsuite.webservices.CustomerSearchBasic, _
            oCustID As New netsuite.webservices.SearchLongCustomField, oInactive As New netsuite.webservices.SearchBooleanField, _