<div class="content"><p>The Receive method is received by the server in an
RPC_REQUEST packet. In response, the server retrieves the <a href="../ms-mqdmpr/9170afda-9524-4abd-91fe-8c53e51e0def" data-linktype="relative-path">Message</a>
at the head of the <i>referenced queue</i>&#39;s <b>MessagePositionList</b> and
removes it.</p><dl>
<dd>
<div><pre> HRESULT Receive(
   [in, optional] VARIANT* Transaction,
   [in, optional] VARIANT* WantDestinationQueue,
   [in, optional] VARIANT* WantBody,
   [in, optional] VARIANT* ReceiveTimeout,
   [in, optional] VARIANT* WantConnectorType,
   [out, retval] IMSMQMessage4** ppmsg
 );
</pre></div>
</dd></dl><p><b>Transaction: </b>A pointer to a <a href="../ms-oaut/a6a540af-38ac-48be-bd40-92e2c01e9aa6" data-linktype="relative-path">VARIANT</a>
that MUST contain either of the following:</p><dl>
<dd>
<p>A VT_DISPATCH or a VT_DISPATCH | VT_BYREF that
points to an <a href="b670ebdc-cd6e-4098-a51f-5d4274d8dfdd" data-linktype="relative-path">MSMQTransaction</a>
object.</p>
</dd>
<dd>
<p>A VT_I4 that corresponds to one of the <a href="3ff1f343-d6e9-4bab-848f-6f2b39209762" data-linktype="relative-path">MQTRANSACTION</a> (section
2.2.2.1) enumeration values.</p>
</dd>
<dd>
<p>If this parameter is not specified by the client,
the <a href="3b7be3f7-651c-4f9c-930b-a9a7c4355ad8#gt_434b0234-e970-4e8c-bdfa-e16a30d96703" data-linktype="relative-path">server</a> MUST use the
default value MQ_MTS_TRANSACTION (0x00000001) in place of the unspecified
value.</p>
</dd></dl><p><b>WantDestinationQueue: </b>A pointer to a VARIANT
(VT_BOOL).</p><dl>
<dd>
<p>If this parameter is not specified by the client,
the server MUST use the default value VARIANT_FALSE (0x0000) in place of the
unspecified value.</p>
</dd>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Value</p>
   </th>
   <th>
   <p>Meaning</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>
  <p>VARIANT_TRUE</p>
  <p>0xFFFF</p>
  </td>
  <td>
  <p>The server MUST return an <a href="2aa64ba4-66ca-440c-bda1-df31bcf00394" data-linktype="relative-path">MSMQMessage</a> object that
  has the DestinationQueueInfo property set.</p>
  </td>
 </tr><tr>
  <td>
  <p>VARIANT_FALSE</p>
  <p>0x0000</p>
  </td>
  <td>
  <p>Default. The server MUST return an MSMQMessage object
  that does not have the DestinationQueueInfo property set.</p>
  </td>
 </tr></tbody></table>
</dd></dl><p><b>WantBody: </b>A pointer to a VARIANT (VT_BOOL).</p><dl>
<dd>
<p>If this parameter is not specified by the client,
the server MUST use the default value VARIANT_TRUE (0xFFFF) in place of the
unspecified value.</p>
</dd>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Value</p>
   </th>
   <th>
   <p>Meaning</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>
  <p>VARIANT_TRUE</p>
  <p>0xFFFF</p>
  </td>
  <td>
  <p>Default. The server MUST return an MSMQMessage object
  that has the Body property set.</p>
  </td>
 </tr><tr>
  <td>
  <p>VARIANT_FALSE</p>
  <p>0x0000</p>
  </td>
  <td>
  <p>The server MUST return an MSMQMessage object that does
  not have the Body property set.</p>
  </td>
 </tr></tbody></table>
</dd></dl><p><b>ReceiveTimeout: </b>A pointer to a VARIANT that
contains a long value (VT_I4) that specifies the time, in milliseconds, that
the server MUST NOT exceed while waiting for a new <a href="3b7be3f7-651c-4f9c-930b-a9a7c4355ad8#gt_85c78cf0-1fb6-4e5d-85f5-a2e9f58a6b9e" data-linktype="relative-path">message</a> to arrive.</p><dl>
<dd>
<p>If this parameter is not specified by the client,
the server MUST use the default value INFINITE (0xFFFFFFFF).</p>
</dd></dl><p><b>WantConnectorType: </b>A pointer to a VARIANT
(VT_BOOL).</p><dl>
<dd>
<p>If this parameter is not specified by the client,
the server MUST use the default value VARIANT_FALSE (0x0000) in place of the
unspecified value.</p>
</dd>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Value</p>
   </th>
   <th>
   <p>Meaning</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>
  <p>VARIANT_TRUE</p>
  <p>0xFFFF</p>
  </td>
  <td>
  <p>The server MUST return an MSMQMessage object that has
  the ConnectorTypeGuid property set.</p>
  </td>
 </tr><tr>
  <td>
  <p>VARIANT_FALSE</p>
  <p>0x0000</p>
  </td>
  <td>
  <p>Default. The server MUST return an MSMQMessage object
  that does not have the ConnectorTypeGuid property set.</p>
  </td>
 </tr></tbody></table>
</dd></dl><p><b>ppmsg: </b>A pointer to a pointer to an <a href="7e7b8992-89c1-40b9-996f-93d68bf434b3" data-linktype="relative-path">IMSMQMessage4</a> interface
that MUST be set by the server with the received message.</p><p><b>Return Values: </b>The method MUST return S_OK
(0x00000000) on success or an implementation-specific error <a href="../ms-dtyp/a9046ed2-bfb2-4d56-a719-2824afce59ac" data-linktype="relative-path">HRESULT</a>
on failure.</p><p>When processing this call, the server MUST follow these
guidelines:</p><ul><li><p><span><span> 
</span></span>If the <i>IsInitialized</i> instance variable equals False:</p>
<ul><li><p><span><span>  </span></span>Return
an error OLE_E_BLANK (0x80040007), and take no further action.</p>
</li></ul></li><li><p><span><span> 
</span></span>If the <i>IsClosed</i> instance variable equals True:</p>
<ul><li><p><span><span>  </span></span>Return
an error MQ_ERROR_INVALID_HANDLE (0xC00E0007), and take no further action.</p>
</li></ul></li><li><p><span><span> 
</span></span>If refQueue.AccessType is not equal to ReceiveAccess or
ReceiveAdminAccess:</p>
<ul><li><p><span><span>  </span></span>Return
an error MQ_ERROR_ACCESS_DENIED (0xC00E0025), and take no further action.</p>
</li></ul></li><li><p><span><span> 
</span></span>If the <i>ppmsg</i> output parameter is NULL:</p>
<ul><li><p><span><span>  </span></span>Return
E_INVALIDARG (0x80070057), and take no further action.</p>
</li></ul></li><li><p><span><span> 
</span></span>If the <i>Transaction</i> input parameter is not NULL:</p>
<ul><li><p><span><span>  </span></span>If
the <i>Transaction</i> input parameter is a VT_DISPATCH or a VT_DISPATCH |
VT_BYREF that points to an enlisted MSMQTransaction object:</p>
<ul><li><p><span><span> 
</span></span>Obtain the MSMQTransaction instance that corresponds to the <i>Transaction</i>
parameter by invoking the <b>IDispatch::QueryInterface</b> method (see section <a href="6b1800d7-4e98-48be-997e-57f09ce52d41" data-linktype="relative-path">3.1</a>) on the <i>Transaction</i>
parameter with the interface identifier of <a href="1097cf5d-f5ed-4eaf-878e-9e4d19ae40e0" data-linktype="relative-path">IMSMQTransaction3</a>.</p>
</li><li><p><span><span> 
</span></span>Define <i>transaction identifier</i> as
MSMQTransaction.Transaction.TransactionIdentifier.</p>
</li></ul></li><li><p><span><span>  </span></span>Else,
if the <i>Transaction</i> input parameter is a VT_I4:</p>
<ul><li><p><span><span> 
</span></span>Define and retrieve <i>transaction identifier</i> as described in
section 2.2.2.1, using the enum numeric value represented by the <i>Transaction</i>
input parameter.</p>
</li></ul></li><li><p><span><span>  </span></span>Else:</p>
<ul><li><p><span><span> 
</span></span>Return an error, and take no further action.</p>
</li></ul></li><li><p><span><span>  </span></span>Identify
the Transaction from the TransactionCollection of the QueueManager, where the
value of the Transaction.Identifier property equals the value of the <i>transaction
identifier</i>.</p>
</li><li><p><span><span>  </span></span>If
a Transaction cannot be located:</p>
<ul><li><p><span><span> 
</span></span>Create a new Transaction, and set the Transaction.Identifier
property to the value of the <i>transaction identifier</i>. Refer to this
Transaction as the identified Transaction from here on.</p>
<ul><li><p><span><span> 
</span></span>Add the created Transaction to the TransactionCollection of the
QueueManager.</p>
</li></ul></li></ul></li></ul></li><li><p><span><span> 
</span></span>Define <i>suitable message</i> as the first Message from the head
of the <b>MessagePositionList</b> of the <i>referenced queue</i> for which the
MessagePosition.State attribute does not equal Locked.</p>
</li><li><p><span><span> 
</span></span>Attempt to retrieve the <i>suitable message</i> by raising the
Dequeue Message event with the following arguments:</p>
</li><li><p><span><span> 
</span></span><i>iQueueDesc</i>: This MUST be set to the <a href="../ms-mqdmpr/e2005510-8785-414e-9a71-fa313fa6e119" data-linktype="relative-path">OpenQueueDescriptor</a>
for the <i>referenced queue</i>.</p>
</li><li><p><span><span> 
</span></span><i>iTimeout</i>: The amount of time to wait, in seconds.</p>
</li><li><p><span><span> 
</span></span><i>iCursor</i>: This MUST be set to a reference to the <i>Cursor</i>
instance variable.</p>
</li><li><p><span><span> 
</span></span><i>iTransaction</i>: If the <i>Transaction</i> input parameter is
not NULL, this MUST be set to a reference to the newly created Transaction
object that provides the unit-of-work for the dequeue operation.</p>
</li><li><p><span><span> 
</span></span>Based on the rStatus, take the following actions:</p>
<ul><li><p><span><span>  </span></span>If
the rStatus is not MQ_OK:</p>
<ul><li><p><span><span> 
</span></span>If the <i>ReceiveTimeout</i> input parameter is 0:</p>
<ul><li><p><span><span> 
</span></span>Set the <i>ppmsg</i> output parameter to NULL.</p>
</li><li><p><span><span> 
</span></span>Return MQ_ERROR_MESSAGE_NOT_FOUND (0xc00e0008), and take no
further action.</p>
</li></ul></li><li><p><span><span> 
</span></span>If the <i>ReceiveTimeout</i> input parameter is INFINITE
(0xFFFFFFFF):</p>
<ul><li><p><span><span> 
</span></span>Block this call until a <i>suitable message</i> is available.</p>
</li><li><p><span><span> 
</span></span>Retrieve the <i>suitable message</i>, and instantiate an
MSMQMessage instance and initialize it with the <i>suitable message</i>,
observing the requirements set forth by the <i>WantBody</i>, <i>WantDestinationQueue</i>,
and <i>WantConnectorType</i> input parameters. For details of initializing the
MSMQMessage object, refer to section <a href="9f3d4014-b019-49ea-a37e-7725b7fb20cf" data-linktype="relative-path">3.17.3</a>.</p>
</li><li><p><span><span> 
</span></span>Set the <i>ppmsg</i> output parameter to the newly instantiated
MSMQMessage instance.</p>
</li></ul></li><li><p><span><span> 
</span></span>If the rStatus is MQ_ERROR_IO_TIMEOUT and if the <i>ReceiveTimeout</i>
input parameter is neither 0 nor INFINITE (0xFFFFFFFF):</p>
<ul><li><p><span><span> 
</span></span>Block the call until either of the following events occurs:</p>
<ul><li><p><span><span> 
</span></span>The time-out specified by the <i>ReceiveTimeout</i> input
parameter expires:</p>
<ul><li><p><span><span> 
</span></span>Set the <i>ppmsg</i> output parameter to NULL.</p>
</li><li><p><span><span> 
</span></span>Return MQ_ERROR_IO_TIMEOUT (0xc00e001b), and take no further
action.</p>
</li></ul></li><li><p><span><span> 
</span></span>If rStatus is MQ_OK:</p>
<ul><li><p><span><span> 
</span></span>Retrieve the <i>suitable message</i>, and instantiate an
MSMQMessage instance and initialize it with the <i>suitable message</i>,
observing the requirements set forth by the <i>WantBody</i>, <i>WantDestinationQueue</i>,
and <i>WantConnectorType</i> input parameters. For details of initializing the
MSMQMessage object, refer to section 3.17.3.</p>
</li><li><p><span><span> 
</span></span>Set the <i>ppmsg</i> output parameter to the newly instantiated
MSMQMessage instance.</p>
</li></ul></li></ul></li></ul></li></ul></li><li><p><span><span>  </span></span>Else,
if one or more <i>suitable messages</i> are available:</p>
<ul><li><p><span><span> 
</span></span>Retrieve the <i>suitable message</i>, and instantiate an
MSMQMessage instance and initialize it with the <i>suitable message</i>,
observing the requirements set forth by the <i>WantBody</i>, <i>WantDestinationQueue</i>,
and <i>WantConnectorType</i> input parameters. For details of initializing the
MSMQMessage object, refer to section 3.17.3.</p>
</li><li><p><span><span> 
</span></span>Set the <i>ppmsg</i> output parameter to the newly instantiated
MSMQMessage instance.</p>
</li></ul></li></ul></li><li><p><span><span> 
</span></span>If the <i>Transaction</i> input parameter is equal to
MQ_MTS_TRANSACTION (0x00000001), MQ_XA_TRANSACTION (0x00000002), or a pointer
to an MSMQTransaction instance:</p>
<ul><li><p><span><span>  </span></span>Set
the <a href="571198d0-5813-455d-b041-6366cd521337" data-linktype="relative-path">State</a> property of
the <i>suitable message</i> to Locked.</p>
</li><li><p><span><span>  </span></span>Create
a new TransactionalOperation, and set:</p>
<ul><li><p><span><span> 
</span></span>The MessageReference property with the <i>suitable message</i>.</p>
</li><li><p><span><span> 
</span></span>The OperationType property to the OperationType.Receive
enumeration value.</p>
</li></ul></li><li><p><span><span>  </span></span>Add
the newly created TransactionalOperation to the
TransactionalOperationCollection of the Transaction previously identified.</p>
</li></ul></li><li><p><span><span> 
</span></span>Else:</p>
<ul><li><p><span><span>  </span></span>If <a href="2f388dcb-36be-44ea-95e7-7e9078c50cc2" data-linktype="relative-path">QueueType</a> is NOT set to
System for the <i>referenced queue</i> and its Journaling property is True:</p>
<ul><li><p><span><span> 
</span></span>Copy the <i>suitable message</i> to the <b>MessagePositionList</b>
of the queue referenced by the JournalQueueReference property of the <i>referenced
queue</i>.</p>
</li></ul></li><li><p><span><span>  </span></span>Remove
the <i>suitable message</i> from the <b>MessagePositionList</b> of the <i>referenced
queue</i>.</p>
</li></ul></li><li><p><span><span> 
</span></span>Return S_OK (0x00000000), and take no further action.</p>
</li></ul></div>