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bool CreateProcessWithParent(DWORD parentId, PWSTR commandline) {
auto hProcess = ::OpenProcess(PROCESS_CREATE_PROCESS, FALSE, parentId);
if (!hProcess)
return false;
SIZE_T size;
//
// call InitializeProcThreadAttributeList twice
// first, get required size
//
::InitializeProcThreadAttributeList(nullptr, 1, 0, &size);
//
// now allocate a buffer with the required size and call again
//
auto buffer = std::make_unique<BYTE[]>(size);
auto attributes = reinterpret_cast<PPROC_THREAD_ATTRIBUTE_LIST>(buffer.get());
::InitializeProcThreadAttributeList(attributes, 1, 0, &size);
//
// add the parent attribute
//
::UpdateProcThreadAttribute(attributes, 0,
PROC_THREAD_ATTRIBUTE_PARENT_PROCESS,
&hProcess, sizeof(hProcess), nullptr, nullptr);
STARTUPINFOEX si = { sizeof(si) };
//
// set the attribute list
//
si.lpAttributeList = attributes;
PROCESS_INFORMATION pi;
//
// create the process
//
BOOL created = ::CreateProcess(nullptr, commandline, nullptr, nullptr,
FALSE, EXTENDED_STARTUPINFO_PRESENT, nullptr, nullptr,
(STARTUPINFO*)&si, &pi);
//
// cleanup
//
::CloseHandle(hProcess);
::DeleteProcThreadAttributeList(attributes);
return created;
}
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