Reading data from usb port

[jantje78]

I'd like to read data from a usb-port,
I've found someone using the following code with a micocontroller that will send data when you push a button, here is the code:

The Qt code:

comPort = new QextSerialPort("COM7");
//set com port settings
 
  comPort->setBaudRate(BAUD9600);
  comPort->setFlowControl(FLOW_HARDWARE);
  comPort->setParity(PAR_NONE);
  comPort->setDataBits(DATA_8);
  comPort->setStopBits(STOP_1);
 
//read data from com port
 
comPort->open(QIODevice::ReadWrite);
        char buff[1024];
        int numBytes;
        QString msg;
        numBytes = comPort->bytesAvailable();
        if(numBytes > 0)
        {
            if(numBytes > 1024){
                 numBytes = 1024;}
           int i = comPort->read(buff, numBytes);
            buff[i] = '\0';
            msg = buff;
         }

comPort = new QextSerialPort("COM7");
//set com port settings
 
  comPort->setBaudRate(BAUD9600);
  comPort->setFlowControl(FLOW_HARDWARE);
  comPort->setParity(PAR_NONE);
  comPort->setDataBits(DATA_8);
  comPort->setStopBits(STOP_1);
 
//read data from com port
 
comPort->open(QIODevice::ReadWrite);
        char buff[1024];
        int numBytes;
        QString msg;
        numBytes = comPort->bytesAvailable();
        if(numBytes > 0)
        {
            if(numBytes > 1024){
                 numBytes = 1024;}
           int i = comPort->read(buff, numBytes);
            buff[i] = '\0';
            msg = buff;
         }

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The .pro filethe directions are from someone else ofcourse)

//my qextserialport  dir is C:/qt/qextserialport
...
INCLUDEPATH += C:/Qt/qextserialport
LIBS += C:\Qt\qextserialport\build\qextserialport.dll
..

//my qextserialport  dir is C:/qt/qextserialport
...
INCLUDEPATH += C:/Qt/qextserialport
LIBS += C:\Qt\qextserialport\build\qextserialport.dll
..

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My question now is, how do I instal qextserialport? I've downloaded qextserialport-1.2.rar from http://sourceforge.net/projects/qext...a.zip/download , but how do I install it?
my qt map is located at: C:\Qt\2010.05\

My qt is based on 4.7 and im running windows 7 x64 home premium.