DDEError (Function)

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DDE functions

DDEError (Function)

In french: DDEErreur

Returns the runtime status report of a DDE function.

Indeed, most of the DDE functions return True if successful and False if a problem occurs. DDEError is used to identify the error that occurred. You also have the ability to use ErrorInfo to find out the error code.

Caution: DDEError and ErrorInfo do not return the same error codes if a DDE error occurs. Indeed, DDEError returns the Windows error code while ErrorInfo returns an error code specific to WINDEV or WEBDEV.

Example

// Connection
MyConnection = DDEConnect("Excel", Subject)
// Error occurred?
IF MyConnection = 0 THEN
SWITCH DDEError()
CASE 1: Error("Initialization error")
CASE 6: Error("The recipient is unknown")
END
END

Syntax

<Result> = DDEError([<Connection identifier>])

<Result>: Integer

Code of last DDE error that occurred on the specified DDE connection.
-1 Syntax error (client = *, subject = *, etc.)
1 Initialization error
2 The program is already stopped
3 The program currently run is started while it is still registered toward WINDEV/WEBDEV (the program did not call DDEDisconnect during a previous execution)
4 Too many programs are registered toward WDDE.DLL (up to 50 programs)
5 Too many messages are found in memory (up to 400 messages)
6 Unknown recipient
7 No message to retrieve: the pile of messages is empty for the requested subject
8 Insufficient memory to start the server
9 The program called is unknown (invalid path)
10 The program called is already run
11 Error while starting the program
12 Error during a memory allocation
13 Error during the DDE initialization
14 Error while connecting to the application (server)
15 Error during the DDE transaction
16 Error while retrieving a DDE data

<Connection identifier>: Optional integer

Connection identifier, returned by DDEConnect. If this parameter is not specified, DDEError is using the last connection handled.

Component : wd250std.dll