getting square box at starting

[clara]

while parsing file i am getting square box at starting but next line it parse correctly this is my code don know hown to solve that. i cant use CStdioFile it wont support for windows ce

CFileDialog dlg(TRUE, _T("*.txt"));
if(dlg.DoModal() == IDOK)
{
CFile f;
if (!f.Open(dlg.GetFileName(), CFile::modeRead | CFile::typeText))
return FALSE;
CString strTotal;
CString strTemp;
while (f.ReadString(strTemp))
{
strTotal += strTemp;
strTotal += _T("\r\n");
}

m_MyEdit = strTotal;

f.Close();
UpdateData(FALSE);
}