USB Win Events messages Detecting in QT

[AlphaWolfXV]

Hello all,
I have been searching through the QT Assistant and the forums here on events and processing them. I am working on an application where I need to detect when the VID/PID of the device is attached/detached to/from the system. From what I have discovered so far, it would appear as though I can create a class using a QAbstractEventDispatcher and an event filter function referencing a pointer to the received message. Which in the implementation would set the instance thread to 0, i.e. m_EvtDispatch = QAbstractEventDispatcher::instance(0);" and then set event filter, "m_EvtDispatch->setEventFilter(myClass::myEventFilter);"

For the function implementation, it would process the message, maybe as a MSG type (unsure). I have a sample I am working with now as described, and the myEvent loop activates, but the parameters don't seem to ever match DBT_DEVICEARRIVAL/DBT_DEVICEREMOVECOMPLETE/or even DBT_DEVNODES_CHANGED, from the WM_DEVICECHANGE message.

I have searched through the QEvent and QActionEvent and multiple others looking for something close on searching for new devices, but I am kind of at a loss. Any help would be greatly appreciated.

Thanks,
Alphawolfxv

[EDIT 2008-Aug-14]: Should have noted system parameters, QT4.3.3, Win Vista.
[EDIT 2008-Aug-14]: Added code sample.

All these files are trying to do is to break when the WM_DEVICECHANGE is received, I can look for the Attach/Detach once this step is complete, I hope...

Header:

#ifndef TESTMSG1_H
#define TESTMSG1_H
 
#include <QtGui/QDialog>
#include <QAbstractEventDispatcher>
#include <QtDebug>
#include <windows.h>
#include <dbt.h>
 
class TestMsg : public QDialog
{
    Q_OBJECT
 
public:
    TestMsg(QWidget *parent = 0);
    ~TestMsg();
 
    static bool myEvtFilter(void *message);
 
private:
    QAbstractEventDispatcher * m_EvtDispatch;
};
 
#endif // TESTMSG1_H

#ifndef TESTMSG1_H
#define TESTMSG1_H

#include <QtGui/QDialog>
#include <QAbstractEventDispatcher>
#include <QtDebug>
#include <windows.h>
#include <dbt.h>

class TestMsg : public QDialog
{
    Q_OBJECT

public:
    TestMsg(QWidget *parent = 0);
    ~TestMsg();
    
    static bool myEvtFilter(void *message);

private:
    QAbstractEventDispatcher * m_EvtDispatch;
};

#endif // TESTMSG1_H

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Implementation:

#include "testmsg1.h"
 
bool TestMsg::myEvtFilter(void *message)
{
	MSG *msg;
	static int i = 0;
 
	msg = (MSG*)message;
		qDebug() << "Test that we are getting events...";
		qDebug() << "message: " << msg->message << " wParam: " << msg->wParam
			<< " lParam: " << msg->lParam << " handle: " << msg->hwnd;
	if (msg->message == WM_DEVICECHANGE) 
	{
		i++;
		qDebug() << "Count:" << i << "wParam:" << msg->wParam << "lParam:" << msg-> lParam;
	}
 
	return false;
}
 
 
TestMsg::TestMsg(QWidget *parent)
    : QDialog(parent)
{
 
	m_EvtDispatch = QAbstractEventDispatcher::instance(0);
	m_EvtDispatch->setEventFilter(TestMsg::myEvtFilter);
}
 
TestMsg::~TestMsg()
{
 
}

#include "testmsg1.h"

bool TestMsg::myEvtFilter(void *message)
{
	MSG *msg;
	static int i = 0;
	
	msg = (MSG*)message;
		qDebug() << "Test that we are getting events...";
		qDebug() << "message: " << msg->message << " wParam: " << msg->wParam
			<< " lParam: " << msg->lParam << " handle: " << msg->hwnd;
	if (msg->message == WM_DEVICECHANGE) 
	{
		i++;
		qDebug() << "Count:" << i << "wParam:" << msg->wParam << "lParam:" << msg-> lParam;
	}
	
	return false;
}


TestMsg::TestMsg(QWidget *parent)
    : QDialog(parent)
{

	m_EvtDispatch = QAbstractEventDispatcher::instance(0);
	m_EvtDispatch->setEventFilter(TestMsg::myEvtFilter);
}

TestMsg::~TestMsg()
{

}

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