33 lines
1.7 KiB
Plaintext
33 lines
1.7 KiB
Plaintext
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Sample: VBTrans
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Purpose:
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This sample uses the MSMQ COM objects from VB and demonstrates how to use the new MSMQ2.0 transactional
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boundary feature.
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The application opens a local transactional queue
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and sends messages to that queue. The messages in the queue appear in a treeview, gathered in the transactions
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to which they belong. The user can then receive the messages from the queue as a single transaction.
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Requirements:
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VB5 or later.
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MSMQ 2.0 or later.
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Overview:
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When a VBTrans application is started, the user is prompted to specify a queue name. The application then creates
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a local queue by that name. On a DS-enabled computer a public queue is created. A private queue will be created
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on a DS-disabled computer.
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If a queue by that name already exists, it is opened only if it is a transactional queue. In this case, the application
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updates the treeview by peeking all queue messages. The transactions are identified by inspecting each message's
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sFirstInTransaction property. If the existing queue is not transactional, the user will be prompted to specify another
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queue name.
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Once the queue has been opened for both send and receive access, and the treeview has been updated, the queue
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DNS pathname will be displayed. This is obtained from the PathNameDNS property of MSMQQueueInfo instance.
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If the queue is not empty, the user can receive messages by clicking the receive button. Note that all messages
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belonging a single transaction will be received.
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After specifying the number of messages to be sent, the send button can be clicked to send the messages to the
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queue. These messages will be sent as a single local transaction. The message labels can be viewed by clicking
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the transaction icon.
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