Dynamic Data Exchange (DDE) is a communication protocol used in Windows operating systems to allow applications to share data and messages with each other.

It enables real-time data exchange between different applications, such as spreadsheets, word processors, and databases, without the need for manual intervention. DDE works by establishing a link between two applications, known as a client and a server.

The client application sends a request for data to the server application, which then responds with the requested information.

This exchange of data can be one-time or continuous, allowing for the automatic updating of information between applications. One of the key benefits of DDE is its ability to facilitate the integration of disparate applications, allowing users to work more efficiently by automating data exchange processes.

For example, a user could create a report in a spreadsheet application that automatically updates with new data from a database application, eliminating the need for manual data entry. However, it is important to note that DDE is an older technology that has largely been replaced by more modern and secure communication protocols, such as OLE (Object Linking and Embedding) and COM (Component Object Model).

These newer technologies offer improved security and functionality compared to DDE, making them more suitable for use in today's software applications. In conclusion, Dynamic Data Exchange (DDE) is a communication protocol that enables real-time data exchange between applications in Windows operating systems.

While it has been largely replaced by newer technologies, it still plays a role in legacy systems and can be a useful tool for integrating applications and automating data exchange processes.