有没有办法来验证一个程序是从一个C ++程序打开它试图打开它（Windows）？ [英] Is there a way to verify a program is open from a C++ program that tries to open it (Windows)?

问题描述

我有一个C ++程序涉及打开一个程序（我们说calculator.exe）。我需要能够测试，以确保这个程序是开放的。这里是我的意思的一个例子。

I have a C++ program that involves opening a program (let's say calculator.exe). I need to be able to test to make sure this program is open. Here's an example of what I mean.

#include <iostream.h>

int main()
{
    system("start calculator");
    if (xxxxx)
        cout << "Calculator is running.\n";

    cin.get();
    return 0;
}

我需要输入什么来测试计算器是否打开？

What would I need to put in for xxxxx that tests whether the calculator is open?

推荐答案

您可以通过进程名称找到它，或者您可以通过窗口标题找到它。

You can find it by process name, or you can find it by window title.

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

DWORD find_by_process_name(const wchar_t* process_name)
{
    DWORD pid = 0;
    HANDLE hndl = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS | TH32CS_SNAPMODULE, 0);
    if (hndl)
    {
        PROCESSENTRY32  process = { sizeof(PROCESSENTRY32) };
        Process32First(hndl, &process);
        do
        {
            if (_wcsicmp(process.szExeFile, process_name) == 0)
            {
                pid = process.th32ProcessID;
                break;
            }
        } while (Process32Next(hndl, &process));

        CloseHandle(hndl);
    }

    return pid;
}

int main()
{
    ShellExecuteA(0, "open", "calc.exe", 0, 0, SW_SHOWNORMAL);
    if (find_by_process_name(L"calc.exe"))
        std::cout << "calculator is running\n";
    return 0;
}

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