MetaTrader 4 DDETool Forex Tool

DDETool makes it possible import any data in real time from Metatrader 4 to third-pary software (supported DDE protocol). For example, we can import quotations (or indicator's value) from MetaTrader to MS Excel for real time analysis.

Dynamic Data Exchange (DDE) is a technology for communication between multiple applications under Microsoft Windows or OS/2.Contents

Overview

Dynamic Data Exchange was first introduced in 1987 with the release of Windows 2.0. It used the "Windows Messaging Layer" functionality within Windows. This is the same system used by the "copy and paste" functionality. Therefore, DDE continues to work even in modern versions of Windows. Newer technology has been developed that has, to some extent, overshadowed DDE (e.g. OLE, COM, and OLE Automation), however, it is still used in several places inside Windows, e.g. for Shell file associations.

The primary function of DDE is to allow Windows applications to share data. For example, a cell in Microsoft Excel could be linked to a value in another application and when the value changed, it would be automatically updated in the Excel spreadsheet. The data communication was established by a simple, three-segment model. Each program was known to DDE by its "application" name. Each application could further organize information by groups known as "topic" and each topic could serve up individual pieces of data as an "item". For example, if a user wanted to pull a value from Microsoft Excel which was contained in a spreadsheet called "Book1.xls" in the cell in the first row and first column, the application would be "Excel", the topic "Book1.xls" and the item "r1c1".

Note: In DDE, the application, topic and item are not case-sensitive.

A common use of DDE was for custom-developed applications to control off-the-shelf software. For example, a custom in-house application might use DDE to open a Microsoft Excel spreadsheet and fill it with data, by opening a DDE conversation with Excel and sending it DDE commands. Today, however, one could also use the Excel object model with OLE Automation (part of COM). While newer technologies like COM offer features DDE doesn't have, there are also issues with regard to configuration that can make COM more difficult to use than DDE. wikipedia org.