普通的启动一个程序使用CreateProcess函数，有时会遇到权限不足失败的情况，那么如何提升执行权限呢？

使用 ShellExecuteEx 函数：

// ------提升权限------
        // Initialize the structure.
        SHELLEXECUTEINFO sei = { sizeof(SHELLEXECUTEINFO) };
        sei.fMask = SEE_MASK_NOCLOSEPROCESS;
        // Ask for privileges elevation.
        sei.lpVerb = TEXT("runas");

        // Create a Command Prompt from which you will be able to start
        // other elevated applications.
        sei.lpFile = szFile;
        sei.lpParameters = szCmdline;
        sei.lpDirectory = szWorking;

        // Don't forget this parameter; otherwise, the window will be hidden.
        sei.nShow = SW_SHOWNORMAL;

        if (!ShellExecuteEx(&sei)) {
                DWORD dwStatus = GetLastError();

                if (dwStatus == ERROR_CANCELLED) {
                        // The user refused to allow privileges elevation.
                        UpdateMessage(_T("用户拒绝安装，升级失败。"));
                }
                else if (dwStatus == ERROR_FILE_NOT_FOUND) {
                        // The file defined by lpFile was not found and
                        // an error message popped up.
                        UpdateMessage(_T("升级包不存在，请检查！"));
                }

                CString strMsg;
                ::GetLastErrorString(strMsg);
                LOG_ERROR(_T("启动安装程序失败：%s"), strMsg);

                return -1;
        }

        m_hCreatePackage = sei.hProcess;                // 句柄

m_hCreatePackage 存储已启动进程的句柄，有了它我们就可以使用 WaitForSingleObject 对其执行各阶段的逻辑进行处理了。

完整代码请参考Github：LiveUpdateDlg.cpp