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原帖：http://hi.baidu.com/brouno/item/0e151c1110217ee99813d683

1.添加消息

消息映射

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BEGIN_MESSAGE_MAP(CAFT_1394Dlg, CDialog)
//{{AFX_MSG_MAP(CAFT_1394Dlg)
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
…
ON_WM_DEVICECHANGE()
//}}AFX_MSG_MAP
声明消息响应函数

[cpp] view plain copy
afx_msg BOOL OnDeviceChange(UINT nEventType, DWORD dwData);
定义函数内容

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BOOL XXXXXXX::OnDeviceChange(UINT nEventType,DWORD dwData)
{
DEV_BROADCAST_DEVICEINTERFACE* dbd = (DEV_BROADCAST_DEVICEINTERFACE*) dwData;

//这里进行信息匹配,比如guid等  

//针对各个事件进行处理.  
switch (nEventType)  
{  
case DBT_DEVICEREMOVECOMPLETE:  
    ...  
        break;  
case DBT_DEVICEARRIVAL:  
    ...  
        break;  
    ...  
        ...  
        ...  

default:  
    break;  
}  

return TRUE;  

}
2.注册设备

[cpp] view plain copy
if (Handle == NULL)
return FALSE;

DEV_BROADCAST_DEVICEINTERFACE DevInt;
memset(&DevInt,0,sizeof(DEV_BROADCAST_DEVICEINTERFACE));
DevInt.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE);
DevInt.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;

DevInt.dbcc_classguid = GetCurrentUSBGUID();//m_usb->GetDriverGUID();
if (!RegisterDeviceNotification(m_hWnd, &DevInt,DEVICE_NOTIFY_WINDOW_HANDLE) )
return FALSE;
只有注册了该设备,OnDeviceChange才能获得详细的信息,否则收到的参数都是0007.

[cpp] view plain copy
public const int WM_DEVICECHANGE = 0x219;
public const int DBT_DEVICEARRIVAL = 0x8000;
public const int DBT_CONFIGCHANGECANCELED = 0x0019;
public const int DBT_CONFIGCHANGED = 0x0018;
public const int DBT_CUSTOMEVENT = 0x8006;
public const int DBT_DEVICEQUERYREMOVE = 0x8001;
public const int DBT_DEVICEQUERYREMOVEFAILED = 0x8002;
public const int DBT_DEVICEREMOVECOMPLETE = 0x8004;
public const int DBT_DEVICEREMOVEPENDING = 0x8003;
public const int DBT_DEVICETYPESPECIFIC = 0x8005;
public const int DBT_DEVNODES_CHANGED = 0x0007;
public const int DBT_QUERYCHANGECONFIG = 0x0017;
public const int DBT_USERDEFINED = 0xFFFF;