摄像头检测不到插入和移除

摄像头检测不到插入和移除

USB 摄像头侦测问题

不知道为什么，U盘能侦测到插入和移除， USB 摄像头就是不行，谁给帮忙解答一下

GUID CAMERA = { 0x6BDD1FC6, 0x810F, 0x11D0, 0xBE, 0xC7, 0x08, 0x00, 0x2B, 0xE2, 0x09, 0x2F };

DEV_BROADCAST_DEVICEINTERFACE NotificationFilter;
ZeroMemory( &NotificationFilter, sizeof(NotificationFilter) );
NotificationFilter.dbcc_size = sizeof(NotificationFilter);
NotificationFilter.dbcc_devicetype=DBT_DEVTYP_DEVICEINTERFACE;
NotificationFilter.dbcc_classguid=CAMERA;
RegisterDeviceNotification(hWnd,&NotificationFilter, DEVICE_NOTIFY_WINDOW_HANDLE);

侦测：
if( message == WM_DEVICECHANGE )
{
if ( wParam==DBT_DEVNODES_CHANGED )
int kk=1;
        else if ( wParam == DBT_DEVICEARRIVAL) // device arrival
{
MessageBox(NULL,"arrival","test",MB_OK);
return 1;
}
else if (wParam == DBT_DEVICEREMOVECOMPLETE) // device remove
{
MessageBox(NULL,"remove","test",MB_OK);
return -1;
}
}