List Box

[C++ Programming]

Hi All
How can i add string in list box fast?I have a file which have 1Lakhs lines.If am adding these line like this

if(file.Open(Name,CFile::modeRead))
{

CString strname;
while(file.end)
{




file.ReadString(strname.Trim());

if(strname.IsEmpty())
{

break;
}

else
{


m_list.InsertString(i,strname);

}

}



file.Close();
}

Then Dialog is showing notresponding.Plz help me How can i add fast.