如何使用c++在windows中获取某个事物的进程ID

How do I get the process ID of something in windows using c++

本文关键字：ID 进程 获取 c++ 何使用 windows      更新时间：2024-09-22

我正在尝试使用进程的名称获取进程的procid。错误是关于procEntry.szExeFile。然而，我得到了错误：

[{
"owner": "C/C++",
"code": "167",
"severity": 8,
"message": "argument of type "WCHAR *" is incompatible with parameter of type "const char *"",
"source": "C/C++",
"startLineNumber": 17,
"startColumn": 17,
"endLineNumber": 17,
"endColumn": 26
},{
"owner": "C/C++",
"code": "167",
"severity": 8,
"message": "argument of type "WCHAR *" is incompatible with parameter of type "const char *"",
"source": "C/C++",
"startLineNumber": 24,
"startColumn": 21,
"endLineNumber": 24,
"endColumn": 30
}]

是否有其他方法可以获取进程ID？我已尝试重新安装c++库。我也试过转换它，但也没用。这是我正在使用的代码：

#include <stdlib.h>
#include <iostream>
#include <string>
#include <windows.h>
#include <TlHelp32.h>
// Get process id from name
DWORD GetProcId(const char* procName)
{
PROCESSENTRY32 procEntry;
procEntry.dwSize = sizeof(procEntry);
HANDLE hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);
if (hSnap == INVALID_HANDLE_VALUE)
return 0;
Process32First(hSnap, &procEntry);
if (!strcmp(procEntry.szExeFile, procName))
{
CloseHandle(hSnap);
return procEntry.th32ProcessID;
}
while (Process32Next(hSnap, &procEntry))
{
if (!strcmp(procEntry.szExeFile, procName))
{
CloseHandle(hSnap);
return procEntry.th32ProcessID;
}
}
CloseHandle(hSnap);
return 0;
}
int main()
{


// Get process id from name
DWORD procId = GetProcId("csgo.exe");
if (!procId)
{
std::cout << "Could not find process" << std::endl;
return 0;
}
// wait for key press
std::cout << "Press any key to continue" << std::endl;
std::getchar();
return 0;

}

您使用的是基于TCHAR的宏，并且在编译项目时定义了UNICODE，因此这些宏映射到基于wchar_t的API(即PROCESSENTRY32->PROCESSENTRY32W、Process32First->Process32FirstW等(。因此，PROCESSENTRY32::szExeFile字段是wchar_t[]阵列。但是，strcmp()需要char*字符串，因此会出现编译器错误。

由于您的函数接受const char*作为输入，因此根本不应该使用TCHARAPI。使用基于Ansi的API，例如：

#include <iostream>
#include <string>
#include <cstring>
#include <windows.h>
#include <TlHelp32.h>
// Get process id from name
DWORD GetProcId(const char* procName)
{
PROCESSENTRY32A procEntry;
procEntry.dwSize = sizeof(procEntry);
HANDLE hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);
if (hSnap == INVALID_HANDLE_VALUE)
return 0;
if (Process32FirstA(hSnap, &procEntry))
{
do
{
if (std::strcmp(procEntry.szExeFile, procName) == 0)
{
CloseHandle(hSnap);
return procEntry.th32ProcessID;
}
}
while (Process32NextA(hSnap, &procEntry));
}
CloseHandle(hSnap);
return 0;
}
int main()
{
// Get process id from name
DWORD procId = GetProcId("csgo.exe");
if (!procId)
{
std::cout << "Could not find process" << std::endl;
return 0;
}
// wait for key press
std::cout << "Press any key to continue" << std::endl;
std::getchar();
return 0;
}

否则，将代码更改为使用wchar_t字符串和基于Wide的API，例如：

#include <iostream>
#include <string>
#include <cwchar>
#include <windows.h>
#include <TlHelp32.h>
// Get process id from name
DWORD GetProcId(const wchar_t* procName)
{
PROCESSENTRY32W procEntry;
procEntry.dwSize = sizeof(procEntry);
HANDLE hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);
if (hSnap == INVALID_HANDLE_VALUE)
return 0;
if (Process32FirstW(hSnap, &procEntry))
{
do
{
if (std::wcscmp(procEntry.szExeFile, procName) == 0)
{
CloseHandle(hSnap);
return procEntry.th32ProcessID;
}
}
while (Process32NextW(hSnap, &procEntry));
}
CloseHandle(hSnap);
return 0;
}
int main()
{
// Get process id from name
DWORD procId = GetProcId(L"csgo.exe");
if (!procId)
{
std::cout << "Could not find process" << std::endl;
return 0;
}
// wait for key press
std::cout << "Press any key to continue" << std::endl;
std::getchar();
return 0;
}

如果可以的话，请远离TCHAR及其相关宏。它们是Win9x/ME时代的残余，当时人们正在将代码从ANSI迁移到UNICODE。它们在现代编码中真的没有地位，因为现在一切都是Unicode。

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