EnumChildWindows gives all elements of a window(Java). But how to know which button is clicked by user? Response will be appreciated

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Java

JNI

he code below gives me all elements of any window but i want to know the particular button/link/textbox accessed by user ...

User32.INSTANCE.EnumChildWindows(GetForegroundWindow(),
                    new User32.WNDENUMPROC() {
                        int count = 1;

                        public boolean callback(HWND hWnd, Pointer userData) {
                            byte[] textBuffer = new byte[512];
                            User32.INSTANCE.GetClassNameA(hWnd, textBuffer, 512);

                            byte[] childBuffer = new byte[512];
                            User32.INSTANCE.GetWindowTextA(hWnd, childBuffer, 512);
                            return true;
                        }
                    }, null);