Searches for a process ID by its name

findProcessID.cpp

#include <iostream>
#include <Windows.h>
#include <TlHelp32.h>

DWORD findProcessID(const std::wstring_view processName);

int main()
{

    std::cout << findProcessID(L"notepad.exe") << '\n';

    return 0;
}

DWORD findProcessID(const std::wstring_view processName)
{

    PROCESSENTRY32 processInfo{};
    processInfo.dwSize = sizeof(processInfo);

    HANDLE procSnapshot{ CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL) };

    if (procSnapshot == INVALID_HANDLE_VALUE) return 0;

    Process32First(procSnapshot, &processInfo);

    if (!processName.compare(processInfo.szExeFile))
    {

        CloseHandle(procSnapshot);
        return processInfo.th32ProcessID;
    }

    while (Process32Next(procSnapshot, &processInfo))
    {

        if (!processName.compare(processInfo.szExeFile))
        {

            CloseHandle(procSnapshot);
            return processInfo.th32ProcessID;
        }
    }

    CloseHandle(procSnapshot);
    return 0;
}