WM_IME_KEYUP (Compact 2013)
This message is sent to an application by the IME to notify the application of a key release. The Parameters and return value for this message are identical to the WM_KEYUP message. An application can process this message or pass it to the DefWindowProc function to generate a matching WM_KEYUP message. This message is usually generated by the IME to keep message order.