Closes the current transaction set by writing its footer segment.
The CreateTransactionFooter method will write any existing segments to the output stream and then generate and write the transaction set closing segment (SE or UNT). If there are no open transaction sets, an exception will be thrown.
This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)