Windows 95 Support for Network DDE

 Last reviewed: September 29, 1995
Article ID: Q125703
The information in this article applies to:
  • Microsoft Win32 Application Programming Interface (API) included with: 

        - Microsoft Windows 95 version 4.0

Network DDE is a technology that allows applications that use the DDE transport to transparently exchange data over a network. It consists of two major components:

  1. The NetDDE agent. This is a service that acts as a proxy for the remote DDE application. It communicates with all local DDE applications, and with remote NetDDE agents using NetBIOS as shown in this chart: 

         Machine A                                        Machine B
   +-----------+                                   +-----------+
   |           |                                   |           |
   | DDE App 1 |                                   | DDE App 2 |
   |           |                                   |           |
   +-----------+                                   +-----------+
           ^ |                                        ^ |
           | |                                        | |
           | |                                        | |
           | |                                        | |
           DDE                                        DDE
       Conversation                               Conversation
           | |                                        | |
           | |                                        | |
           | V                                        | V
        +------+                                   +------+
        |NetDDE|                                   |NetDDE|
        | Agent| < ------ NetBIOS session ------ > | Agent|
        +------+                                   +------+

  2. A DLL that implements NetDDE API functions such as NDdeShareAdd, NDdeShareDel, and so on. This DLL is usually named NDDEAPI.DLL.

In the interests of backwards compatibility, Windows 95 includes a NetDDE agent and a 16-bit NetDDE API DLL. However, Windows 95 does not include a 32-bit NetDDE API DLL. Consequently, 32-bit applications that use NetDDE API functions will need to thunk to the 16-bit NETAPI.DLL.

Additional reference words: 4.00
KBCategory: kbnetwork kbui
KBSubcategory: UsrNetDde

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Last reviewed: September 29, 1995
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