How to GetItemData of a Checked Item of a CCheckListBox?

From:

=?Utf-8?B?TGFuZG9u?= <Landon@discussions.microsoft.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 16 Jul 2008 05:02:20 -0700

Message-ID:

<F59B3B63-C514-4394-8F6A-1940F38C084D@microsoft.com>

I use MFC VC++ 4.2.

I have been successful in creating CCheckListBox and now I have a problem
with getting the item data.

I need if an item is checked, I want to get that item's text.

Here is when I add the item to the CListBox:
        CStringList strFilePathLst;
    POSITION pos = strFilePathLst.GetHeadPosition();
    int i = 0;
    while( pos!= NULL ){
        CString sFullPathName = strFilePathLst.GetNext( pos );
        if( !sFullPathName.IsEmpty() ){
            int iPos = sFullPathName.ReverseFind( '\\' );
            CString sFileName;
            if( iPos != -1 )
                sFileName = sFullPathName.Right( sFullPathName.GetLength() - ( iPos + 1
) );
            m_lst_filenames.AddString( sFileName );
            m_lst_filenames.SetItemData( i, i );
            m_lst_filenames.SetCheck( i, 0 );
        }
        i++;
    }

Here is when I tried to get the checked item data:

    CStdioFile file;
    if( file.Open( sShpFile, CFile::modeWrite | CFile::modeCreate ) ){
        for( int i = 0; i < m_lst_filenames.GetCount(); i++ ){
            if( m_lst_filenames.GetCheck( i ) ){
                //isikan semua nama file tersebut ke file toadevdb.shp
                CString sStrFileName = ( CString )m_lst_filenames.GetItemData( i );
                m_strShpFiles.AddTail( m_sScadRelPath + sStrFileName );
                file.WriteString( sStrFileName + "\n" );
            }
        }
        file.Close();
    }

When I traced it, the sStrFileName variable was EMPTY.

So what was wrong or missing from the above code?

Thank you.