Using OLE to Perform Standard DDE Operations
ID: Q74801
The information in this article applies to:
- Microsoft OLE version 1.0
In general, the OLE libraries can be used to
perform the same types of operations as the Dynamic Data Exchange
Management Library (DDEML). With the OLE libraries, an application can:
- Initialize conversations based on application and topic names or
wild cards
- Request data for named items in negotiated formats from a server
- Establish an advise loop, (that is, request that a server notify the
client of changes to the values of specified items, and optionally
send the data when the change occurs)
- Send data from a server to a client
- Poke data from a client to a server
- Send a command (execute string) to the server
To get an idea of how these operations are performed using the OLE
libraries, review the OLE library API. Except for sending commands, the OLE
API was designed with embedded and linked objects in mind; however, OLE is
applicable to traditional, nonpersistent DDE items.
Because DDE execute strings are outside of the realm of the OLE protocol, a
special API has been provided. The OleExecute function in OLECLI (the OLE
client library) enables an application to send a DDE execute command with
an arbitrary command string. The server responds to this command using the
Execute method defined in the OLEDOCUMENTVTBL structure.
Additional reference words: OLE DDEML 3.10 1.00
KBCategory: kbole kbprg
KBSubcategory: LeoneCliMisc LeoneSvrMisc
Last Reviewed: February 17, 1995