C / C++ / MFC

// Check if listbox should be scrolled to end
BOOL CListBoxChat::IsAutoScroll()
{
	int nBottom = GetBottomIndex();		
	if(nBottom == LB_ERR) return FALSE;
	return (GetBottomIndex() == GetCount()-1)?TRUE:FALSE;
}

// Returns last visible item in a listbox
int CListBoxChat::GetBottomIndex()
{
	ASSERT(m_hWnd);
	CRect rect;
	GetClientRect(rect);				
	int nIndex = LOWORD(::SendMessage(m_hWnd, LB_ITEMFROMPOINT, 0, MAKELPARAM(0, rect.bottom)));

	//note: ItemFromPoint returns a WORD not a UINT!
	if (nIndex == LOWORD(LB_ERR)) 			
	{
		nIndex = LB_ERR;
	}
	return nIndex;
}

MyObject *mo;
SwapTiles(*mo);