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          Replace the specified message in the current message store. Syntax
          object.ReplaceMessage( [MessageIndex] ) Parameters
          
            MessageIndexAn integer value which specifies the message that is to be
            replaced in the message store. If this parameter is omitted, the
            current message as specified by the value of the StoreIndex
            property will be used. Return Value
          A value of zero is returned if the method succeeds.
          Otherwise, a non-zero error code is returned which indicates the
          cause of the failure. Remarks
          The ReplaceMessage method replaces the specified message
          with a new message. The message number may be a message that has been
          previously marked for deletion. It is important to note that the
          change will not be reflected in the physical storage file until it
          has been closed. This method will update the current message index in
          the storage file. The message store must be opened with write access. This method
          will fail if you attempt to replace a message from a storage file
          that has been opened for read-only access. If the application
          needs to replace messages in the message store, it is recommended
          that the file be opened for exclusive access using the
          mimeStoreLock option when calling the OpenStore
          method. See Also
          StoreCount Property,
          StoreIndex Property,
          DeleteMessage Method, 
          PurgeStore Method, 
          ReadStore Method, 
          WriteStore Method |