Logs which processes have received window focus

WindowFocusLogger.c

#include <stdio.h>
#include <Windows.h>

VOID CALLBACK WinEventProcHook(HWINEVENTHOOK hWinEventHook, DWORD event, HWND hwnd, 
                LONG idObject, LONG idChild, DWORD idEventThread, DWORD dwmsEventTime) {
    DWORD ProcessId = 0;
    if (GetWindowThreadProcessId(hwnd, &ProcessId) != 0) {
        HANDLE ProcessHandle = OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, FALSE, ProcessId);
        if (ProcessHandle != (HANDLE)(-1)) {
            char buffer[MAX_PATH] = {0};
            GetProcessImageFileNameA(ProcessHandle, buffer, MAX_PATH);
            printf("[%u]: %s received focus\n", dwmsEventTime, buffer);
            CloseHandle(ProcessHandle);
        }
    }
}

INT main(VOID) {
    CoInitialize(0);
    printf("[*] Hello World!\n");

    HWINEVENTHOOK HandleWinEventHook = SetWinEventHook(EVENT_OBJECT_FOCUS, EVENT_OBJECT_FOCUS, NULL, 
                                        WinEventProcHook, 0, 0, WINEVENT_OUTOFCONTEXT);
    if (HandleWinEventHook == 0) {
        printf("[!] Failed to setup WinEventHook!\n");
        return 1;
    }
    
    MSG msg = {0};
    
    while (1) {
        GetMessage(&msg, NULL, 0, 0);
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    
    UnhookWinEvent(HandleWinEventHook);
    CoUninitialize();
}