msvcr100d.dll处有未处理的异常?报错

@平原君 你好，想跟你请教个问题：

void TCPScan::OnScanStart() 
{
	// TODO: Add your control notification handler code here
	GetDlgItem(IDC_ScanStart)->EnableWindow(FALSE);

	bStop = false;
	bPause = false;
    ThreadParament *param = new ThreadParament;
	memset(param,0,sizeof(ThreadParament));
	DWORD startip,endip;
	this->m_ipfrom.GetAddress(startip);
	this->m_ipto.GetAddress(endip);
	param->dwOriginalIP = startip;
	if(this->m_ifsingleip)
    {
        param->dwLastIP =startip;
	}
	else
    {
	   param->dwLastIP = endip;
	}
	this->UpdateData(true);
	param->dwOriginalPort = this->m_portfrom;
    if(m_ifsingleport)
	{
		param->dwLastPort = this->m_portfrom;
	}
	else
	{
	    param->dwLastPort = this->m_portto;
	}
	this->UpdateData(false);
	param->dwTimeOut = 2;

AfxGetApp()->m_pMainWnd->SendMessage(WM_SCAN_START,WPARAM(param),scantype);           
}

其中，ThreadParament的代码为：

struct ThreadParament
{
	DWORD dwOriginalIP,dwLastIP,dwOriginalPort,dwLastPort,dwTimeOut,dwTimeForOnePort,dwPacketNo;
	pcap_if_t *SelectDev;
	char HostMac[6];
	DWORD dwHostIP,dwNetMAsk,dwDefaultGateway,dwTimeBetweenToPackets;
};

   AfxGetApp()->m_pMainWnd->SendMessage(WM_SCAN_START,WPARAM(param),scantype);