There are some programs in C++

Qt Code: 
  1. #include <cstdlib>
  2. #include <iostream>
  3. #include <windows.h>
  4. #include "AtUsbHid.h"
  5.  
  6. using namespace std;
  7.  
  8. int main(int argc, char *argv[])
  9. {
  10.     HINSTANCE hLib = NULL;
  11.     hLib =LoadLibrary(AT_USB_HID_DLL);
  12.     if(hLib == NULL){
  13.         cout << "boing\n";
  14.     }
  15.     loadFuncPointers(hLib);
  16.  
  17.     DYNCALL(findHidDevice)(Vid, Pid);
  18.     DYNCALL(hidRegisterDeviceNotification)((m_hWnd));
  19.  
  20.     system("PAUSE");
  21.     return EXIT_SUCCESS;
  22. }
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This realization is already on the QT. What am I doing wrong?

Qt Code: 
  1. #include "mainwindow.h"
  2. #include "ui_mainwindow.h"
  3. #include <QLibrary>
  4. #include <QMessageBox>
  5. #include <cstdlib>
  6. #include <stdio.h>
  7. #include <conio.h>
  8. #include <windows.h>
  9. #include <stddef.h>
  10. #include <windowsx.h>
  11.  
  12. // Include Atmel Hid Usb
  13. #include "AtUsbHid.h"
  14.  
  15. #define DEFAULT_VID 0x03EB
  16. #define DEFAULT_PID 0x2013
  17.  
  18.  
  19.  
  20. MainWindow::MainWindow(QWidget *parent) :
  21.     QMainWindow(parent),
  22.     ui(new Ui::MainWindow)
  23. {
  24.     ui->setupUi(this);
  25.  
  26. }
  27.  
  28. MainWindow::~MainWindow()
  29. {
  30.     delete ui;
  31.  
  32.     Vid = DEFAULT_VID;
  33.     Pid = DEFAULT_PID;
  34. }
  35.  
  36.  
  37.  
  38. void MainWindow::on_ConnectUsb_clicked()
  39. {
  40.             QLibrary hLib(AT_USB_HID_DLL);
  41.             hLib.load();
  42.  
  43.             if (!hLib.load())
  44.                 {
  45.                 QMessageBox::warning(this, tr("Error"),
  46.                                      tr("Not found AtUsbHid.dll"),
  48.                 return;
  49.                 }
  50.  //***********************************************************
  51.         typedef void (*func)();
  52.         func PF_findHidDevice = (func) hLib.resolve("findHidDevice)(Vid, Pid)");
  53.         if (!PF_findHidDevice)
  54. 		{
  55.             qDebug ("!!!!!!!!findHidDevice");
  56.             return;
  57.         }
  58.  
  59.  
  60.         typedef void (*func)();
  61.         func PF_hidRegisterDeviceNotification = (func) hLib.resolve("hidRegisterDeviceNotification");
  62.         if (!PF_hidRegisterDeviceNotification)
  63.             {
  64.             qDebug ("!!!!!!!!hidRegisterDeviceNotification");
  65.             return;
  66.             }
  67. //***********************************************************
  68. }
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