The operating system sends the DBT_QUERYCHANGECONFIG device message to request permission to change the current configuration (dock or undock). Any application can deny this request and cancel the change.
To send the DBT_QUERYCHANGECONFIG device message, the operating system sends the WM_DEVICECHANGE message with wParam set to DBT_QUERYCHANGECONFIG and lParam set to zero.
Return TRUE to grant permission to change the configuration.
Return BROADCAST_QUERY_DENY to deny permission to change the configuration.
DBT_CONFIGCHANGECANCELED, DBT_CONFIGCHANGED, WM_DEVICECHANGE
file: /Techref/os/win/api/win32/mess/src/msg03_27.htm, 1KB, , updated: 2000/4/7 12:19, local time: 2024/9/3 23:58,
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