MSMQMessage.Priority (Windows Embedded CE 6.0)
1/6/2010
This property specifies the message's priority. A low number indicates a low priority message.
Syntax
HRESULT get_Priority(
long* plPriority
);
HRESULT put_Priority(
long lPriority
);
Parameters
plPriority or lPriority
Integer value between 7 and 0, where 0 indicates a low priority message.The default is 3.
Return Value
The following table describes the common return values.
| Value | Description |
|---|---|
S_OK |
Success |
E_INVALIDARG |
One or more arguments are invalid |
E_NOTIMPL |
The function contains no implementation |
E_OUTOFMEMORY |
Out of memory |
Remarks
Message priority effects how Message Queuing handles the message while it is in route, as well as where the message is placed in the queue.
Higher priority messages are given preference during routing, and inserted toward the front of the queue.
For example, when routing messages Message Queuing handles messages with a priority of 7 before it handles messages with a priority of 0, When the message is delivered to the destination queue, Message Queuing places the priority 7 messages closer to the front of the queue.
Messages with the same priority are placed in the queue according to their arrival time.
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Messages sent to public queues
When Message Queuing routes a message to a public queue, the priority level of the message is added to the priority level of the public queue (the priority level of the queue is specified by the MSMQQueueInfo.BasePriority property of the queue). However, the priority level of the queue has no effect on how messages are placed in the queue.
Message priority within transactions
Message Queuing sets the priority level of transactional messages to 0: MSMQMessage.Priority is ignored by the transaction.
Equivalent Function Property
When using MSMQ functions, the priority level of a message can be set using PROPID_M_PRIORITY.
Requirements
| Header | mqoai.h |
| Library | mqoa.lib |
| Windows Embedded CE | Windows CE .NET 4.0 and later |