阻塞调用ShellExecute函数

SHELLEXECUTEINFO si;
ZeroMemory(&si, sizeof(si));
si.cbSize = sizeof(si);
si.fMask = SEE_MASK_NOCLOSEPROCESS;
si.lpVerb = _T("open");
si.lpFile = _T("notepad.exe");
si.nShow = SW_SHOWNORMAL;

ShellExecuteEx(&si);

DWORD dwExitCode;
GetExitCodeProcess(si.hProcess,&dwExitCode);
while (dwExitCode == STILL_ACTIVE)
{ 
   Sleep((DWORD)5);
   GetExitCodeProcess(si.hProcess, &dwExitCode);
}

CloseHandle(si.hProcess);