(Windows only)
Sends
a new value to a dynamic data exchange (DDE) server data item associated
with the specified DDE conversation.
This statement is supported
only for backward compatibility. Use the Component Object Model
(COM) instead.
Note: Does not apply to SpeedScript
programming.
Syntax
DDE SEND ddeid SOURCE data ITEM name
[ TIME seconds]
[ NO-ERROR ]
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-
ddeid
- An integer expression that equals the channel number of the
conversation opened for the specified data item. It is the value
returned by the DDE INITIATE statement that opened the conversation.
- SOURCE data
- Specifies the new value for the server data item, where data is
a character expression that renders the new value in a format acceptable
to the data item.
- ITEM name
- Specifies the name of the server data item to receive the new
value. The data item name is a character expression
that identifies the data item according to the conventions of the
server application (for example, the row and column coordinates
of a worksheet cell, such as R2C1 in Microsoft Excel).
- TIME seconds
- Specifies the maximum number of seconds that the ABL client
waits for the DDE SEND statement to complete, where seconds is
an integer expression. If you do not specify the TIME option or
specify a value of 0, the AVM waits indefinitely for the statement
to complete.
- NO-ERROR
- By default, if the statement fails to send the value to the
data item, the AVM raises the ERROR condition and posts the error
to the DDE frame DDE-ERROR attribute. If you specify NO-ERROR, the
AVM does not raise the ERROR condition, but does post the error
to the DDE frame.
Example
The
following fragment shows a typical use of the DDE SEND statement.
It assumes that the Microsoft Excel application is running, and
has created the default Excel worksheet, Sheet1. It then uses the
DDE INITIATE statement to open a conversation with Sheet1 as the
topic. This allows the AVM to exchange data with the cells of the
worksheet. In this example, the fragment assigns column headings
to the top row of the first three columns in the worksheet using
the DDE SEND statement.
DEFINE VARIABLE Sheet1 AS INTEGER NO-UNDO. /* DDE-ID to worksheet topic */
DEFINE VARIABLE DDEframe AS HANDLE NO-UNDO. /* DDE frame handle */
CREATE FRAME DDEframe. /* Create DDE frame */
. . .
/* Open a DDE conversation with Sheet1 and assign column headings. */
DDE INITIATE Sheet1 FRAME DDEframe APPLICATION "Excel" TOPIC "Sheet1".
DDE SEND Sheet1 SOURCE "Name" ITEM "R1C1".
DDE SEND Sheet1 SOURCE "YTD Sales" ITEM "R1C2".
DDE SEND Sheet1 SOURCE "State" ITEM "R1C3".
. . .
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Note
For more
information on using the DDE protocol to exchange data with non-ABL
applications, see OpenEdge Development: Programming Interfaces.
