Exchanging data with DDE or OLE

Exchanging data among applications is an important feature of multitasking environments such as Microsoft Windows. You're probably already familiar with one way to share data: the Windows Clipboard. With Clipboard objects and methods such as CopyToClipboard, Delphi enables you to take advantage of the Clipboard. See Chapter 10 for an example that uses the Clipboard, or search online Help for TClipboard for more information about using Clipboard objects.

Data sharing methods such as Dynamic Data Exchange (DDE) and Object Linking and Embedding (OLE) are even more powerful. With them, you can automatically reflect changes in one data file to many users using many instances of your application. You can create a front end that integrates the data and functionality of a word processor, spreadsheet, and database all in one application. You can even run and control other applications from within your application.

This chapter discusses

  • Using DDE
  • Using OLE
  • Comparing DDE and OLE

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Project Management Made Easy

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