誕生日

#include <windows.h>

#include <stdio.h>

int main() {

    HANDLE hPipeRead, hPipeWrite;

    SECURITY_ATTRIBUTES sa = { sizeof(SECURITY_ATTRIBUTES), NULL, TRUE };

    if (!CreatePipe(&hPipeRead, &hPipeWrite, &sa, 0)) {

        return GetLastError();

    }

    STARTUPINFO si = { sizeof(STARTUPINFO) };

    si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;

    si.wShowWindow = SW_HIDE;

    si.hStdOutput = hPipeWrite;

    PROCESS_INFORMATION pi;

    if (!CreateProcess(NULL, "your_command_here", NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi)) {

        return GetLastError();

    }

    CloseHandle(hPipeWrite);

    char buffer[4096];

    DWORD bytesRead;

    std::string output;

    while (ReadFile(hPipeRead, buffer, sizeof(buffer), &bytesRead, NULL) && bytesRead > 0) {

        output.append(buffer, bytesRead);

    }

    CloseHandle(hPipeRead);

    // `output` に取り込んだ画面出力が格納されています

    // プロセスの終了を待つ

    WaitForSingleObject(pi.hProcess, INFINITE);

    // ハンドルを閉じる

    CloseHandle(pi.hProcess);

    CloseHandle(pi.hThread);

    return 0;

}