Entry
Delphi: DDE: DDEclient/server: Use: How to use DDE?
Oct 5th, 2003 10:10
Knud van Eeden,
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--- Knud van Eeden --- 05 October 2003 - 06:51 pm --------------------
Delphi: DDE: DDEclient/server: Use: How to use DDE?
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[help: source: program: Delphi 7]
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Dynamic Data Exchange (DDE) sends data to and receives data from other
applications.
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With Delphi, you can use this data to exchange text with
other applications.
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You can also send commands and macros to other
applications, so your application can control other applications.
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Here is a typical way to use DDE: a link between two applications is
established, either by your application or the other application.
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Once
this link (called a conversation) is established, the two applications
can continuously and automatically send text data back and forth.
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When
the text changes in one application, DDE automatically updates the text
in the other.
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To understand DDE applications, you need to become familiar with the
concept of DDE conversations.
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When to use DDE?
You want to use DDE when exchanging distinct text strings.
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If all you
want to know is the bottom line of a profits spreadsheet, it makes
sense to link the cell that contains the bottom line to a Delphi DDE
client application.
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You could then output the data in an edit box or label.
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DDE protects
the data in the spreadsheet by not allowing the user to activate and
edit the spreadsheet from your client application.
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Note: Not all applications support DDE.
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To determine whether an
application supports DDE, refer to its documentation.
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Internet: see also:
Delphi: DDE: DDEclient/server: Create: How to create a DDE server
application?
http://www.faqts.com/knowledge_base/view.phtml/aid/25164/fid/175
Delphi: DDE: DDEclient/server: Create: How to create a DDE client
application?
http://www.faqts.com/knowledge_base/view.phtml/aid/25162/fid/175
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