Control Exception Message

I'm opening an Excel template and checking the format of the template. If the format is not correct I want to send the appropriate message. I got it to work but it seems like a excessive use of try-catch. Is there a better way?

vb Code:

Try
            oExcel.Workbooks.Open(Filename:=m_inFile)
            Try
                oSht = CType(oExcel.Workbooks(1).Worksheets("control"), Excel.Worksheet)
            Catch ex As Exception
 
            End Try
            If oSht Is Nothing Then
                Throw New System.Exception("Invalid Template Format: No Control Sheet")
            End If
            oExcel.Visible = m_visible
        Catch ex As Exception
            MessageBox.Show("TemplateReader.Open: " & ex.Message.ToString)
        End Try

Actually, there is nothing wrong with nested Try/Catch blocks. However, in your case, your inner Try/Catch isn't doing anything on error, is that intentional?

Quote:

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However, in your case, your inner Try/Catch isn't doing anything on error, is that intentional?

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It was. That was the only way that I could get the message that I wanted. I let the exception thrown by Excel fall through the cracks then throw my exception that describes what really happend.