Tree Column in Virtual Mode

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   I have tried playing with the VirtualList example given for setting up a virtual mode Report Control.  While I can get the virtual mode to go, I can't get individual columns to actually...work.

If I add a checkbox to a column, clicking it checks every checkbox in that column.

If I use a tree column (this is true of the sample as it exists too), I cannot expand/collapse the tree nodes.

I am setting the checkboxes and tree mode in the override of CXTPReportRecord::GetItemMetrics as the example shows.  I am not setting the check state of the boxes, though, so similar to this:

void CMyVirtualRecord::GetItemMetrics(XTP_REPORTRECORDITEM_DRAWARGS* pDrawArgs, XTP_REPORTRECORDITEM_METRICS* pItemMetrics)
{
    CString strColumn = pDrawArgs->pColumn->GetCaption();
    int nIndexCol = pDrawArgs->pColumn->GetItemIndex();
    int nIndexRow = pDrawArgs->pRow->GetIndex();
    int nCount = pDrawArgs->pControl->GetRows()->GetCount();
    CXTPReportRecord* pRecord = pDrawArgs->pRow->GetRecord();
    switch( nIndexCol )
    {
    case 0:
        pItemMetrics->strText.Format( _T( "Item %d" ), nIndexRow );
        if( pRecord != NULL )
        {
            CXTPReportRecordItem* pItem = pRecord->GetItem( nIndexCol );
            if( pItem != NULL )
            {
                pItem->SetIconIndex( 0 );
                pItem->HasCheckbox( TRUE, FALSE );
            }
        }
        break;

What am I doing wrong, or what do I need to do to make buttons and tree nodes work??  Updating the VirtualList sample to make the tree nodes work would be extremely helpful.

Thanks,

K.