Sent to an application when the operating system is about to change the current IME. A window receives this message through its WindowProc function.
A handle to window.
Selection indicator. This parameter specifies TRUE if the indicated IME is selected. The parameter is set to FALSE if the specified IME is no longer selected.
Input locale identifier associated with the IME.
This message has no return value.
An application that has created an IME window should pass this message to that window so that it can retrieve the keyboard layout handle to the newly selected IME.
The DefWindowProc function processes this message by passing the information to the default IME window.
Minimum supported client
|Windows 2000 Professional [desktop apps only]|
Minimum supported server
|Windows 2000 Server [desktop apps only]|