Help with Word Interop used by Service   

Hi there,

I have written a Windows Service that has a timer, which when elapsed, goes to a DB, retrieves the latest rows, and opens a doc specified by a row with Interop.Word using the following code:

Public Sub processQueue()
        Dim job As PrintJob
        Dim docFileName As String
        Dim wordApp As ApplicationClass

        If Directory.Exists(webDrivePrefix) Then
            Do While Not m_objPQ.Peek Is Nothing
                job = m_objPQ.Pop
                job.connStr = Me.connStr

                Try
                    If File.Exists(webDrivePrefix & job.docURI) Then
                        wordApp = New ApplicationClass
                        wordApp.Documents.Open(webDrivePrefix & job.docURI)
                        wordApp.Documents(1).Activate()
                        wordApp.ActivePrinter = Me.printerName
                        wordApp.ActiveDocument.PrintOut()

                        m_objEventLog.WriteEntry("Printed " & docFileName & " for REVIEW ID: " & job.reviewID)

                        job.setStatusPrinted(Me.myUserId)

                        m_objEventLog.WriteEntry("Updated DB for REVIEW ID: " & job.reviewID)
                    End If

                Catch ex As Exception
                    m_objEventLog.WriteEntry(ex.Message.ToString, EventLogEntryType.Error)
                    Throw ex

                Finally
                    wordApp.ActiveDocument.Close()
                    wordApp = Nothing
                End Try

                File.Delete(webDrivePrefix & job.docURI)
            Loop

        Else
            Throw New Exception("WebDrive: '" & webDrivePrefix & "' not found!")
        End If
    End Sub

However, as soon I get to the line "wordApp = New ApplicationClass", nothing happens.  No error, the code does not continue, nothing.  The timer elapses, and the process repeats.  I have attached the debugger to the process, and can walk through the code to that point, and it is as if I had hit the Resume button once I step over the suspect line of code.

If I view the threads window in VS, I see an accumulation of "processQueue" threads (one for each run of the function).

What am I doing wrong?  Is the code bad, or is there some permissions issue with the Interop DLL?  Or something else entirely?  I am totally out of my depth here, so any input would be greatly appreciated!

Cheers,

Christopher Burns
--------------------------------
From: Christopher Burns

-----------------------
Posted by a user from .NET 247 (http://www.dotnet247.com/)

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date: Sun, 15 May 2005 05:23:56 -0700   author:   Christopher Burns via .NET 247