(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 ]
|
-
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
- The NO-ERROR option is used to prevent the statement from raising ERROR
and displaying error messages.
Regardless of whether NO-ERROR is used, the AVM posts the error to the DDE frame
DDE-ERROR attribute.
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".
. . .
|
Note
For more
information on using the DDE protocol to exchange data with non-ABL
applications, see OpenEdge External Programming Interface Reference.
