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Retrieves the last error that occurred during a Magic xpa DDE conversation. A subsequent call to DDERR clears the previously reported error code and resets the return value. This function retrieves useful information for debugging purposes.
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Syntax:
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DDERR ( )
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Parameters:
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None
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Returns:
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A numeric value ranging between 0 and 15, with the following meanings:
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0
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No error in the last DDE operation, or a reset return value if this is the second consecutive call to the function
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1
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Failure to initialize the DDEML system
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2
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Failure to connect to the server (could be a wrong or missing service parameter in the preceding DDE call)
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3
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Server was busy during the DDE call and could not service the call
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4
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Server did not process the DDE service required (could be a wrong parameter, an invalid combination of parameters, or an invalid required service combination)
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5
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The last DDEGet failed (server could not provide the required item)
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6
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No item was specified on a GET or POKE request
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7
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No command was specified on an EXEC request
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14
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Unknown type of error
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15
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Attempt to execute a DDE function on an operating system other than Windows
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See also:
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DDEBegin, DDEEnd, DDEGet, DDEPoke, DDExec
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