Thread: MQCreateQueue

I am having trouble creating a message queue using MSMQ. I have little experience with C++ API. The following code compiles, but throws a "Failed to initialize error at runtime."

Code:

HRESULT MsgQueueCreate()
{
	//Define the number of properties for each Msg Queue
	const int NUMBER_OF_PROPERTIES = 3;

	//First we have to define the MQQUEUEPROPS structure 
	MQQUEUEPROPS		mq_props;
	//and its properties
	MQPROPVARIANT	mq_prop_variant[NUMBER_OF_PROPERTIES];
	QUEUEPROPID		mq_prop_id[NUMBER_OF_PROPERTIES];
	HRESULT			mq_prop_hr[NUMBER_OF_PROPERTIES];
	HRESULT result = MQ_OK;
	DWORD prop_id = 0;

	//Define a format name buffer and a buffer length
	WCHAR formatBuffer[256];
	DWORD formatBufferLength = sizeof(formatBuffer)/sizeof(formatBuffer[0]);

	PSECURITY_DESCRIPTOR securityDescriptor;


	//Next step is to fill in the values for the structure
	mq_prop_id[prop_id] = PROPID_Q_PATHNAME;
	mq_prop_variant[prop_id].vt = VT_NULL;
	mq_prop_variant[prop_id].pwszVal = L".\\PRIVATE$\\MyPrivateQueue"; 

	//increment the prop_id each time properties are added to the structure
	prop_id++;

	LPWSTR mq_label = L"Msg Queue";
	mq_prop_id[prop_id] = PROPID_Q_LABEL;
	mq_prop_variant[prop_id].vt = VT_LPWSTR;
	mq_prop_variant[prop_id].pszVal = (char*)mq_label;

	
	//increment the prop_id for the property count
	prop_id++;

	//initialize the MQQUEUEPROPS struct with the declared values
	mq_props.cProp = prop_id;
	mq_props.aPropID = mq_prop_id;
	mq_props.aPropVar = mq_prop_variant;
	mq_props.aStatus = mq_prop_hr;
	securityDescriptor = NULL;

	result = MQCreateQueue(securityDescriptor, &mq_props, formatBuffer, &formatBufferLength);
	
	return result;
}