C++ 根据程序名称获取线程ID

可以使用Windows API函数 `GetThreadId` 来根据线程句柄获取线程ID。获取线程句柄可以使用 Windows API 函数 `CreateToolhelp32Snapshot` 和 `Thread32First`、`Thread32Next` 函数遍历系统中所有线程快照，检查每个线程的进程ID和线程名是否匹配。若匹配，则即可获取该线程的句柄，再通过 `GetThreadId` 函数获取线程ID。以下是一个示例代码：

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

DWORD GetThreadIdByName(const std::wstring& name) {
    DWORD threadId = 0;
    HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
    if (snapshot == INVALID_HANDLE_VALUE) {
        return 0;
    }
    THREADENTRY32 threadEntry = { sizeof(THREADENTRY32) };
    if (Thread32First(snapshot, &threadEntry)) {
        do {
            if (threadEntry.th32OwnerProcessID == GetCurrentProcessId()) {
                HANDLE threadHandle = OpenThread(THREAD_QUERY_INFORMATION, FALSE, threadEntry.th32ThreadID);
                if (threadHandle != nullptr) {
                    TCHAR moduleName[MAX_PATH] = { 0 };
                    GetModuleFileNameEx(threadHandle, nullptr, moduleName, MAX_PATH);
                    if (wcsstr(moduleName, name.c_str()) != nullptr) {
                        threadId = GetThreadId(threadHandle);
                        CloseHandle(threadHandle);
                        break;
                    }
                    CloseHandle(threadHandle);
                }
            }
        } while (Thread32Next(snapshot, &threadEntry));
    }
    CloseHandle(snapshot);
    return threadId;
}

调用示例：

DWORD threadId = GetThreadIdByName(L"myprogram.exe");
if (threadId != 0) {
    // 获取到线程ID，可以执行相关操作
} else {
    // 未找到指定名称的线程
}