C / C++ / MFC

void CMultiColorTree::OnPaint() 
{
	CPaintDC dc(this);
	
	// Create a memory DC compatible with the paint DC
	CDC memDC;
	memDC.CreateCompatibleDC( &dc );
	
	CRect rcClip, rcClient;
	dc.GetClipBox( &rcClip );
	GetClientRect(&rcClient);
	
	// Select a compatible bitmap into the memory DC
	CBitmap bitmap;
	bitmap.CreateCompatibleBitmap( &dc, rcClient.Width(), rcClient.Height() );
	memDC.SelectObject( &bitmap );
	
	// Set clip region to be same as that in paint DC
	CRgn rgn;
	rgn.CreateRectRgnIndirect( &rcClip );
	memDC.SelectClipRgn(&rgn);
	rgn.DeleteObject();
	
	// First let the control do its default drawing.
	CWnd::DefWindowProc( WM_PAINT, (WPARAM)memDC.m_hDC, 0 );
	
	HTREEITEM hItem = GetFirstVisibleItem();
	
	int n = GetVisibleCount()+1;
	while( hItem && n--)
	{
		CRect rect;
		
		// Do not meddle with selected items or drop highlighted items
		UINT selflag = TVIS_DROPHILITED | TVIS_SELECTED;
		Color_Font cf;
		
		if ( m_mapColorFont.Lookup( hItem, cf ))
		{
                       // [... not important ...]
			{
				CFont *pFontDC;
				CFont fontDC;
				LOGFONT logfont;
				
				if( cf.logfont.lfFaceName[0] != '\0' ) 
				{
					logfont = cf.logfont;
				}
				else
				{
					// No font specified, so use window font
					CFont *pFont = GetFont();
					pFont->GetLogFont( &logfont );
				}
				
				if( GetItemBold( hItem ) )
					logfont.lfWeight = 700;
				fontDC.CreateFontIndirect( &logfont );
				pFontDC = memDC.SelectObject( &fontDC );
				
				if( cf.color != (COLORREF)-1 )
					memDC.SetTextColor( RGB(0,0,0) );
				//				memDC.SetTextColor( cf.color );
				
				CString sItem = GetItemText( hItem );
				
				GetItemRect( hItem, &rect, TRUE );
				CRect tmpRect;
				tmpRect.SetRect(rect.left,rect.top,rect.right,rect.bottom);
				//tmpRect.SetRect(rect.left - (rect.left - rcClient.left),rect.top,rect.right + (rcClient.right - rect.right),rect.bottom);
				
				CBrush brush;
				brush.CreateSolidBrush(cf.color);
				//memDC.SetBkColor( GetSysColor( COLOR_WINDOW ) );
				memDC.FillRect(&tmpRect,&brush);
				memDC.SetBkColor(cf.color);
				memDC.TextOut( rect.left+2, rect.top+1, sItem );

				memDC.SelectObject( pFontDC );
			}
		}
		hItem = GetNextVisibleItem( hItem );
	}
        dc.BitBlt( rcClip.left, rcClip.top, rcClip.Width(), rcClip.Height(), &memDC, 
		rcClip.left, rcClip.top, SRCCOPY );
}