如何用VC.net 接收USB设备的信息

我也在写获取USB信息的程序，不过现在我啥都不懂，资料也不好找啊。
谢谢你的代码。

好好研究研究，，，

先把自己的帖子定起来.

我在VC++.net (2008)里编写了个小程序来监测USB接口的信息.我发现,无论如何,我查到的信息都是DBT_PLTUSBHEADSET. USB耳机插入USB口和拔出USB耳机,都是同一个消息. 感觉很奇怪, 有没有高手指点一下,如何监测到更多的信息啊? 谢谢先!!!

#include "stdafx.h"
#include "WinMain.h"
#include <Dbt.h>

#define MAX_LOADSTRING 100



// 全局变量:
HINSTANCE hInst;                                // 当前实例
TCHAR szTitle[MAX_LOADSTRING];                    // 标题栏文本
TCHAR szWindowClass[MAX_LOADSTRING];            // 主窗口类名

// 此代码模块中包含的函数的前向声明:
ATOM                MyRegisterClass(HINSTANCE hInstance);
BOOL                InitInstance(HINSTANCE, int);
LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK    About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY _tWinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPTSTR    lpCmdLine,
                     int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

     // TODO: 在此放置代码。
    MSG msg;
    HACCEL hAccelTable;

    // 初始化全局字符串
    LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
    LoadString(hInstance, IDC_WINMAIN, szWindowClass, MAX_LOADSTRING);
    MyRegisterClass(hInstance);

    // 执行应用程序初始化:
    if (!InitInstance (hInstance, nCmdShow))
    {
        return FALSE;
    }

    hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_WINMAIN));

    // 主消息循环:http://www.

    while (GetMessage(&msg, NULL, 0, 0))
    {
        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return (int) msg.wParam;
}



//
//  函数: MyRegisterClass()
//
//  目的: 注册窗口类。
//
//  注释:
//
//    仅当希望
//    此代码与添加到 Windows 95 中的“RegisterClassEx”
//    函数之前的 Win32 系统兼容时，才需要此函数及其用法。调用此函数十分重要，
//    这样应用程序就可以获得关联的
//    “格式正确的”小图标。
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
    WNDCLASSEX wcex;

    wcex.cbSize = sizeof(WNDCLASSEX);

    wcex.style            = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc    = WndProc;
    wcex.cbClsExtra        = 0;
    wcex.cbWndExtra        = 0;
    wcex.hInstance        = hInstance;
    wcex.hIcon            = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_WINMAIN));
    wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground    = (HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName    = MAKEINTRESOURCE(IDC_WINMAIN);
    wcex.lpszClassName    = szWindowClass;
    wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

    return RegisterClassEx(&wcex);
}

//
//   函数: InitInstance(HINSTANCE, int)
//
//   目的: 保存实例句柄并创建主窗口
//
//   注释:
//
//        在此函数中，我们在全局变量中保存实例句柄并
//        创建和显示主程序窗口。
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   HWND hWnd;

   hInst = hInstance; // 将实例句柄存储在全局变量中

   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

   if (!hWnd)
   {
      return FALSE;
   }

   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}

//
//  函数: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  目的: 处理主窗口的消息。
//
//  WM_COMMAND    - 处理应用程序菜单
//  WM_PAINT    - 绘制主窗口
//  WM_DESTROY    - 发送退出消息并返回
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    int wmId, wmEvent;
    PAINTSTRUCT ps;
    HDC hdc;

    switch (message)
    {
    case WM_COMMAND:
        wmId    = LOWORD(wParam);
        wmEvent = HIWORD(wParam);
        // 分析菜单选择:
        switch (wmId)
        {
        case IDM_ABOUT:
            DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
            break;
        case IDM_EXIT:
            DestroyWindow(hWnd);
            break;
        default:
            return DefWindowProc(hWnd, message, wParam, lParam);
        }
        break;
    case WM_PAINT:
        hdc = BeginPaint(hWnd, &ps);
        // TODO: 在此添加任意绘图代码...
        EndPaint(hWnd, &ps);
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
/*
    case WM_DEVMODECHANGE:
        MessageBox(hWnd, _T("WM_DEVMODECHANGE"),_T("DEVMODECHANGE"), MB_OK);
        break;
*/
    case WM_DEVICECHANGE:
        {
           switch(wParam)
            {
                case DBT_DEVICEARRIVAL:
                    MessageBox(hWnd, _T("DBT_DEVICEARRIVAL"),_T("DBT_DEVICEARRIVAL"), MB_OK);
                    break;

                case DBT_DEVICEQUERYREMOVE:
                    MessageBox(hWnd, _T("DBT_DEVICEQUERYREMOVE"),_T("DBT_DEVICEQUERYREMOVE"), MB_OK);
                    break;

                case DBT_DEVICEQUERYREMOVEFAILED:
                    MessageBox(hWnd, _T("DBT_DEVICEQUERYREMOVEFAILED"),_T("DBT_DEVICEQUERYREMOVEFAILED"), MB_OK);
                    break;

                case DBT_DEVICEREMOVEPENDING:
                    MessageBox(hWnd, _T("DBT_DEVICEREMOVEPENDING"),_T("DBT_DEVICEREMOVEPENDING"), MB_OK);
                    break;

                case DBT_DEVICEREMOVECOMPLETE:
                    MessageBox(hWnd, _T("DBT_DEVICEREMOVECOMPLETE"),_T("DBT_DEVICEREMOVECOMPLETE"), MB_OK);
                    break;

                case DBT_DEVICETYPESPECIFIC:
                    MessageBox(hWnd, _T("DBT_DEVICETYPESPECIFIC"),_T("DBT_DEVICETYPESPECIFIC"), MB_OK);
                    break;

                case DBT_PLTUSBHEADSET:  // DBT_PLTUSBHEADSET == 0x0007
                    MessageBox(hWnd, _T("DBT_PLTUSBHEADSET"),_T("DBT_PLTUSBHEADSET"), MB_OK);
                    break;

                case DBT_CONFIGCHANGED:
                    MessageBox(hWnd, _T("DBT_CONFIGCHANGED"),_T("DBT_CONFIGCHANGED"), MB_OK);
                    break;

                default:
                    {
                        WCHAR dcinfo[20]={0};
                        _itow(wParam, dcinfo,sizeof(dcinfo));
                        MessageBox(hWnd, dcinfo,_T("Speical Value"), MB_OK);
                    }
                    break;

            }
        }
        break;

    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}

// “关于”框的消息处理程序。
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
    UNREFERENCED_PARAMETER(lParam);
    switch (message)
    {
    case WM_INITDIALOG:
        return (INT_PTR)TRUE;

    case WM_COMMAND:
        if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
        {
            EndDialog(hDlg, LOWORD(wParam));
            return (INT_PTR)TRUE;
        }
        break;
    }
    return (INT_PTR)FALSE;
}