The operating system sends the DBT_DEVICEARRIVAL device message when a device has been inserted and becomes available.
To send the DBT_DEVICEARRIVAL device message, the operating system sends the WM_DEVICECHANGE message with wParam set to DBT_DEVICEARRIVAL and lParam set to the address of a DEV_BROADCAST_HDR structure identifying the device inserted.
dwData = (DWORD) lParam;
Return TRUE.
DEV_BROADCAST_HDR, WM_DEVICECHANGE
file: /Techref/os/win/api/win32/mess/src/msg03_21.htm, 1KB, , updated: 2000/4/7 12:19, local time: 2024/9/3 23:57,
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