#include <iostream>
#include <fstream>
#include <locale>
#include <windows.h>

std::wofstream file;

template <typename T1, typename T2, typename T3, typename T4>
void diag_log(T1 arg1, T2 arg2, T3 arg3, T4 arg4)
{
    file.imbue(std::locale(".utf-8", LC_ALL));
    file << arg1 << ' ' << arg2 << ' ' << arg3 << ' ' << arg4 << std::endl;
}

int wmain()
{
    std::locale::global(std::locale(".utf-8",LC_ALL));

    file.open(L"D:\\file.txt");

    HANDLE hHeap = GetProcessHeap();
    LPVOID buffer = HeapAlloc(hHeap, HEAP_ZERO_MEMORY, 256);

    HWND hProgman = FindWindowW(L"Progman", NULL);
    HWND hBattery = FindWindowW(L"SystemTray_Main", NULL);

    GetWindowTextW(hProgman, (LPWSTR)buffer, 256 - sizeof(WCHAR)); // L"Program Manager"
    diag_log(L"HWND:", hProgman, L"Title:", (LPWSTR)buffer);

    GetWindowTextW(hBattery, (LPWSTR)buffer, 256 - sizeof(WCHAR)); // L"Индикатор батарей"
    diag_log(L"HWND:", hBattery, L"Title:", (LPWSTR)buffer);

    HeapFree(hHeap, NULL, buffer);
    file.close();
    return 0;
}

/*
Вывод:
HWND: 00020100 Title: Program Manager
HWND: 000201E8 Title:
*/