Dequeue Context

The message to be decoded is supplied by either a dequeue context or a caller-supplied input routine. When using a dequeue context, observe the following points:

• Specify MTA_DECODE_DQ for the input_type call argument.

• Pass the dequeue context from mtaDequeueStart() as the input argument.

• The recipient list of the message being dequeued must have already been read by mtaDequeueRecipientNext() before calling mtaDecodeMessage().

• mtaDequeueMessageFinish() must not yet have been called for the dequeue context.

• After using a dequeue context with mtaDecodeMessage(), no further calls to mtaDequeueRecipientNext() can be made.

• Calls to mtaDequeueLineNext() can only be performed after a call to mtaDequeueRewind().