The system sends the DBT_DEVICETYPESPECIFIC device message when a device-specific event occurs.
To send the DBT_DEVICETYPESPECIFIC device message, the system sends the WM_DEVICECHANGE message with wParam set to DBT_DEVICETYPESPECIFIC and lParam set as described in the following.
dwData = (DWORD) lParam;
Return TRUE.
Windows NT: Requires version 5.0 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in dbt.h.
System Messages Overview, System Message Messages, DEV_BROADCAST_HDR, WM_DEVICECHANGE