List running processes with package family name

proclist.cpp

// proclist.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <Windows.h>
#include <TlHelp32.h>
#include <wil/resource.h>
#include <appmodel.h>
int main()
{
    wil::unique_handle snapshot(CreateToolhelp32Snapshot(TH32CS_SNAPALL, 0));

    if (snapshot.get() == INVALID_HANDLE_VALUE)
    {
        std::cerr << "Failed to create snapshot: " << GetLastError() << std::endl;
        return 1;
    }

    PROCESSENTRY32W processEntry{ sizeof(PROCESSENTRY32W) };
    if (!Process32FirstW(snapshot.get(), &processEntry))
    {
        std::cerr << "Failed to get first process: " << GetLastError() << std::endl;
        return 1;
    }
    do
    {
        std::wstring packageFamilyName;
        // try to get the package name
        wil::unique_process_handle processHandle(OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, processEntry.th32ProcessID));
        if (processHandle.get())
        {
            WCHAR packageName[PACKAGE_NAME_MAX_LENGTH];
            uint32_t packageNameLength = ARRAYSIZE(packageName);
            if (GetPackageFamilyName(processHandle.get(), &packageNameLength, packageName) == S_OK)
            {
                packageFamilyName = packageName;
            }
        }

        std::wcout << processEntry.szExeFile << L" (PID: " << processEntry.th32ProcessID << L")";
        if (!packageFamilyName.empty())
        {
            std::wcout << L" - Package: " << packageFamilyName;
        }

        std::wcout << std::endl;
    } while (Process32NextW(snapshot.get(), &processEntry));
}