Accessing Excel from Word.

I’m using Office 2010, using VBA to access an Excel Spreadsheet to pick up some values for my Word document’s Custom Control Listboxes. At the moment I’m trying to make the Word code “bombproof”, using “On Error Goto xxx”. I’ve had a look around to see if there’s a way to see if the error occurred after I’ve opened the Spreadsheet, but before I’ve closed it. Short of setting a User flag to say it’s open, I can’t see a way to interrogate the Excel Workbook Object to see if it’s open. Does anyone know a way?

Code snippets

Dim exWB As Excel.Workbook
Dim objExcel As New Excel.Application
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Set exWb = objExcel.Workbooks.Open(strPathToTags)
.
.
exWb.Close (False)
Set exWb = Nothing