Retrieves the most recent error code set by the failure of a Dynamic Data Exchange Management Library (DDEML) function and resets the error code to DMLERR_NO_ERROR.
UINT DdeGetLastError( DWORD idInst );
The application instance identifier obtained by a previous call to the DdeInitialize function.
If the function succeeds, the return value is the last error code, which can be one of the following values.
||A request for a synchronous advise transaction has timed out.|
||The response to the transaction caused the DDE_FBUSY flag to be set.|
||A request for a synchronous data transaction has timed out.|
||A DDEML function was called without first calling the DdeInitialize function, or an invalid instance identifier was passed to a DDEML function.|
||An application initialized as APPCLASS_MONITOR has attempted to perform a DDE transaction, or an application initialized as APPCMD_CLIENTONLY has attempted to perform server transactions.|
||A request for a synchronous execute transaction has timed out.|
A parameter failed to be validated by the DDEML. Some of the possible causes follow:
The application used a data handle initialized with a different item name handle than was required by the transaction.
The application used a data handle that was initialized with a different clipboard data format than was required by the transaction.
The application used a client-side conversation handle with a server-side function or vice versa.
The application used a freed data handle or string handle.
More than one instance of the application used the same object.
||A DDEML application has created a prolonged race condition (in which the server application outruns the client), causing large amounts of memory to be consumed.|
||A memory allocation has failed.|
||A client's attempt to establish a conversation has failed.|
||A transaction has failed.|
||A request for a synchronous poke transaction has timed out.|
||An internal call to the PostMessage function has failed.|
||An application instance with a synchronous transaction already in progress attempted to initiate another synchronous transaction, or the DdeEnableCallback function was called from within a DDEML callback function.|
||A server-side transaction was attempted on a conversation terminated by the client, or the server terminated before completing a transaction.|
||An internal error has occurred in the DDEML.|
||A request to end an advise transaction has timed out.|
||An invalid transaction identifier was passed to a DDEML function. Once the application has returned from an XTYP_XACT_COMPLETE callback, the transaction identifier for that callback function is no longer valid.|
|Minimum supported client||Windows 2000 Professional [desktop apps only]|
|Minimum supported server||Windows 2000 Server [desktop apps only]|
|Header||ddeml.h (include Windows.h)|