<Tr> <Td> </Td> <Td> This article needs attention from an expert on the subject . Please add a reason or a talk parameter to this template to explain the issue with the article . When placing this tag, consider associating this request with a WikiProject . (July 2011) </Td> </Tr> <Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2011) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2011) (Learn how and when to remove this template message) </Td> </Tr> <P> In computing, Dynamic Data Exchange (DDE) is a method of interprocess communication under Microsoft Windows or OS / 2 . It allows one program to subscribe to items made available by another program, for example a cell in a Microsoft Excel spreadsheet, and be notified whenever that item changes . DDE was partially superseded by Object Linking and Embedding (OLE), but remains used for simple interprocess communication tasks . </P>

What is a dde connection to microsoft excel