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
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows XP |
| Minimum supported server |
Windows Server 2003 |
| Header |
|