DBT_CONFIGCHANGED event

The system broadcasts the DBT_CONFIGCHANGED device event to indicate that the current configuration has changed, due to a dock or undock. An application or driver that stores data in the registry under the HKEY_CURRENT_CONFIG key should update the data.

To broadcast this device event, the system uses the WM_DEVICECHANGE message with wParam set to DBT_CONFIGCHANGED and lParam set to zero.

LRESULT CALLBACK WindowProc(
  HWND hwnd,       // handle to window
  UINT uMsg,       // WM_DEVICECHANGE
  WPARAM wParam,   // device-change event
  LPARAM lParam    // event-specific data
);

Parameters

hwnd

A handle to a window.

uMsg

The WM_DEVICECHANGE message identifier.

wParam

Set to DBT_CONFIGCHANGED.

lParam

Set to zero.

Return value

Return TRUE.

Requirements

See also

Device Events

Device Management Events

WM_DEVICECHANGE