C/C++ Code Example: Retrieving PROPID_Q_BASEPRIORITY

The following example retrieves the PROPID_Q_BASEPRIORITY property for a known queue and then prints the returned value to the screen.

#include <windows.h>
#include <stdio.h>
#include <mq.h>                       // MSMQ header file


int main(int arg, char *argv[])

{
  ////////////////////////////////////////////////////////////////////
  //  Define structures.
  ////////////////////////////////////////////////////////////////////
  
  #define NUMBEROFPROPERTIES 1
  DWORD cPropId = 0;
  
  MQQUEUEPROPS qprops;
  PROPVARIANT aQueuePropVar[NUMBEROFPROPERTIES];
  QUEUEPROPID aQueuePropId[NUMBEROFPROPERTIES];
  HRESULT aQueueStatus[NUMBEROFPROPERTIES];
  
  HRESULT hr;
  DWORD dwFormatNameBufferLength = 256;
  WCHAR wszFormatNameBuffer[256];
  
  
  ////////////////////////////////////////////////////////////////////
  // Specify PROPID_Q_BASEPRIORITY.
  ////////////////////////////////////////////////////////////////////
  
  aQueuePropId[cPropId] = PROPID_Q_BASEPRIORITY; // Property ID
  aQueuePropVar[cPropId].vt = VT_I2;            // Type indicator
  cPropId++;
  
  
  ////////////////////////////////////////////////////////////////////
  // Add additional queue properties here. When adding 
  // properties, increment cProp to 
  // reflect total number of properties.
  ////////////////////////////////////////////////////////////////////
  
  
  ////////////////////////////////////////////////////////////////////
  // Initialize the MQQUEUEPROPS structure.
  ////////////////////////////////////////////////////////////////////
  
  qprops.cProp = cPropId;           // Number of properties
  qprops.aPropID = aQueuePropId;        // Ids of properties
  qprops.aPropVar = aQueuePropVar;      // Values of properties
  qprops.aStatus = aQueueStatus;        // Error reports
  
  
  ////////////////////////////////////////////////////////////////////
  //Get format name of queue.
  ////////////////////////////////////////////////////////////////////
 
  hr = MQPathNameToFormatName(L".\\testqueue",
                              wszFormatNameBuffer,
                                  &dwFormatNameBufferLength);
  if (FAILED(hr))
  {
    fprintf(stderr, "Failed in MQPathNameToFormatName, error = 0x%x\n",hr);
  return -1;
  }
 
 
  ////////////////////////////////////////////////////////////////////
  // Get queue property.
  ////////////////////////////////////////////////////////////////////
  
  hr = MQGetQueueProperties(wszFormatNameBuffer, &qprops);
  if (FAILED(hr))
  {
    fprintf(stderr, "Failed in MQGetQueueProperties, error = 0x%x\n",hr);
    return -1;
  }
  
  
  ////////////////////////////////////////////////////////////////////
  // Review returned value. This example prints 
  // out the priority level of the queue.
  ////////////////////////////////////////////////////////////////////
  
  printf("PROPID_Q_BASEPRIORITY is set to ");
  printf("%d.\n", aQueuePropVar[0].iVal);
  
  return 0;
 
}