最終更新:2015-07-09 (木) 16:40:45 (3207d)

WM_DEVICECHANGE
DEV_BROADCAST_HDR
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typedef struct _DEV_BROADCAST_HDR {
  DWORD dbch_size;
  DWORD dbch_devicetype;
  DWORD dbch_reserved;
} DEV_BROADCAST_HDR, *PDEV_BROADCAST_HDR;

DEV_BROADCAST_HDR.dbch_devicetype

名前	値	Meaning
DBT_DEVTYP_DEVICEINTERFACE	0x00000005	Class of devices. This structure is a DEV_BROADCAST_DEVICEINTERFACE structure.
DBT_DEVTYP_HANDLE?	0x00000006	File system handle. This structure is a DEV_BROADCAST_HANDLE? structure.
DBT_DEVTYP_OEM?	0x00000000	OEM- or IHV-defined device type. This structure is a DEV_BROADCAST_OEM? structure.
DBT_DEVTYP_PORT?	0x00000003	Port device (serial or parallel). This structure is a DEV_BROADCAST_PORT? structure.
DBT_DEVTYP_VOLUME?	0x00000002	Logical volume. This structure is a DEV_BROADCAST_VOLUME? structure.

http://www.codeproject.com/Articles/14500/Detecting-Hardware-Insertion-and-or-Removal

WM_DEVICECHANGEのwParamがDBT_DEVICEARRIVALかDBT_DEVICEREMOVECOMPLETE?だったときの lParam (Only upon port and volume change.)

if ( DBT_DEVICEARRIVAL == wParam || DBT_DEVICEREMOVECOMPLETE == wParam ) {
       PDEV_BROADCAST_HDR pHdr = (PDEV_BROADCAST_HDR)lParam;