Baumer工业相机堡盟相机如何使用BGAPI SDK实现相机资源的正确释放（C++）

void CGigeDemoDlg::OnBnClickedCancel()
{
  // TODO: 在此添加控件通知处理程序代码
  USES_CONVERSION;
  //执行相机关闭指令
  try
  {
  if (m_pDevice != NULL)
  {
    if (m_pDevice->GetRemoteNodeList()->GetNodePresent("AcquisitionAbort"))
    {
    m_pDevice->GetRemoteNode("AcquisitionAbort")->Execute();
    }
    m_pDevice->GetRemoteNode("AcquisitionStop")->Execute();
  }
  }
  catch (BGAPI2::Exceptions::IException& ex)
  {
  CString str1;
  str1.Format(_T("ExceptionType:%s! ErrorDescription:%s in function:%s"),ex.GetType(),ex.GetErrorDescription(),ex.GetFunctionName());
  MessageBox(str1);
  }
  //停止相机的采集流
  //STOP DataStream acquisition
  try
  {
  if (m_pDataStream != NULL)
  {
    m_pDataStream->StopAcquisition();
    m_pBufferList->DiscardAllBuffers();
  }
  }
  catch (BGAPI2::Exceptions::IException& ex)
  {
  CString str2;
  str2.Format(_T("ExceptionType:%s! ErrorDescription:%s in function:%s"),ex.GetType(),ex.GetErrorDescription(),ex.GetFunctionName());
  MessageBox(str2);
  }
  //释放相机的采集流
  //Release buffers
  try
  {
  if (m_pDataStream != NULL)
  {
    while (m_pBufferList->size() > 0)
    {
    m_pBuffer = m_pBufferList->begin()->second;
    m_pBufferList->RevokeBuffer(m_pBuffer);
    delete m_pBuffer;
    }
    //关闭相机的数据流
    m_pDataStream->Close();
    //关闭相机的设备
    m_pDevice->Close();
    //关闭相机连接的网口
    m_pInterface->Close();
    //关闭相机连接的实例类
    m_pSystem->Close();
    //释放相机连接类的资源
    BGAPI2::SystemList::ReleaseInstance();
    //Enable the button_inialize
    //GetDlgItem(ID_BTNINITIALIZE)->EnableWindow(TRUE);
  }
  }
  catch (BGAPI2::Exceptions::IException& ex)
  {
  CString str3;
  str3.Format(_T("ExceptionType:%s! ErrorDescription:%s in function:%s"),ex.GetType(),ex.GetErrorDescription(),ex.GetFunctionName());
  MessageBox(str3);
  }
  CDialogEx::OnCancel();
}

//STOP DataStream acquisition
  try
  {
  if (m_pDataStream != NULL)
  {
    **m_pDataStream->StopAcquisition();**
    m_pBufferList->DiscardAllBuffers();
  }
  }
  catch (BGAPI2::Exceptions::IException& ex)
  {
  CString str2;
  str2.Format(_T("ExceptionType:%s! ErrorDescription:%s in function:%s"),ex.GetType(),ex.GetErrorDescription(),ex.GetFunctionName());
  MessageBox(str2);
}