Product : ISaGRAF V.3.x
Date : 4-june-1997
File : NetDDE.DDE exchanges with NT target over a network.htm
Subject : DDE exchanges with NT target over a network
Keywords: DDE - NT target - network - DDEShare.exe
How to use DDE exchanges with the NT target over a network ?
Following is a description of the method :
With NetDDE services, it is possible to access a DDE server over a
network. To achieve this, the DDE client instead of connecting to
the DDE server directly, will use a share. A share is a description
of the DDE server, it has a name : the share name. To describe a
share, we will use the DDEShare.exe application. This application
can be used on any PC under NT.
1) On the DDE server side, start the ‘Network DDE‘ service :
1.1) On the DDE server PC, launch the DDEShare application:
. click on 'start' button from NT menu bar
. click on 'run' menu item
. then type 'DDESHARE'
A new window with menus will appear.
1.3) With the ‘Shares/DDE Shares’ menu , add a share.
1.4) Give a name in the ‘Share Name’ box, this name will
be used latter for DDE connections ex :’Target1’
1.5) Fill in the Static Application Name with ‘ISASRVs’
where s is the slave number of the ISaGRAF NT target
you want to use.
1.6) Fill in the static Topic Name with the name of the
running application to which you want to establish
a DDE connection.
1.7) Click on OK : you have created a share.
1.8) You have to trust it now to be able to use it in a
remote connection. Select the share you want to
trust and click on ‘Trust Share’
1.9) Check the ‘Initiate to Application Enable’ box and
click on OK
1.10)That’s all for declaring a share, you can now close
the DDEShare application.
12) Start the ISaGRAF NT target on the DDE server PC,
start your application when DDE server is enabled.
2) On the client side :
Note : If the client is running Windows95, you’ll have to start
NetDDE.exe first (no window is visible when this executable runs)
2.1) You just have to initiate a connection with
the following server name :
\\machineName\NDDE$ where machineName is the name of
the PC NT DDE server and NDDE$ is a permanent NetDDE
(You do not have to enter ISASRV1, because that name
has already been entered in share name)
The topic name is the name of the share example :
2.2) It is possible that the DDE connection manager
asks you for a user name and a password (and a domain
name), you will have to use a registered user and non
This user should be registered on the server PC NT.
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