Try the MatrikonOPC Server for DDE for FREE now. The MatrikonOPC Server for DDE download is shareware that can be distributed freely. It is a fully functioning application that can be used for 30 days after which time it must be licensed.
The MatrikonOPC Interface for DDE is used to exchange information between an OPC Client and a DDE Server. The MatrikonOPC Server for DDE provides key DDE functionality such as read and write access to all valid DDE server items, and DDE server connection status. This application can be used by any OPC compliant application, such as an HMI or Process Historian, to connect to dde servers such as Microsoft Excel, Matlab, Six Sigma statistical package MiniTab, etc.