C / C++ / MFC

LRESULT CComboBoxExt::OnCtlColorListBox(WPARAM wParam, LPARAM lParam)
{
    // If the listbox hasn't been subclassed yet, do so
    ...

    // CWnd *pWnd = CWnd::FromHandle((HWND)lParam);
    // UINT nID = npWnd->GetDlgCtrlID();
    // nCtlColor = CTLCOLOR_LISTBOX;

    CDC* pDC = CDC::FromHandle((HDC)wParam);

    // move your attributes here
    ...

    return hbr;
}

HBRUSH CMyDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
   HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);

   if (pWnd->GetDlgCtrlID() == IDC_COMBO1)
   {
       pDC->SetBkMode(TRANSPARENT);
       pDC->SetTextColor(RGB(128,128, 128));
       hbr = m_brush;
   }

   return hbr;
}

//    header
	CListBox m_ListBox;

//   implementation
	ON_WM_CTLCOLOR()

HBRUSH CComboBoxExt::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
	HBRUSH hbr = CComboBox::OnCtlColor(pDC, pWnd, nCtlColor);

	// TODO: Change any attributes of the DC here

	if(nCtlColor == CTLCOLOR_EDIT)
	{
		if(m_Edit.GetSafeHwnd() == NULL)
		{
			m_Edit.SubclassWindow(pWnd->GetSafeHwnd());
		}
		if(! m_bAlertText)pDC->SetTextColor(COLOR_BLACK);
		else pDC->SetTextColor(COLOR_RED);
		if(! m_bAlertBkg)pDC->SetBkColor(COLOR_WHITE);
		else
		{
			pDC->SetBkColor(COLOR_ALERT);
			hbr = m_hBrushAlert;
		}
	}

	if(nCtlColor == CTLCOLOR_LISTBOX)
	{
		if(m_ListBox.GetSafeHwnd() == NULL)
		{
			m_ListBox.SubclassWindow(pWnd->GetSafeHwnd());
			m_pWndProc = reinterpret_cast<WNDPROC>(GetWindowLong(m_ListBox, GWL_WNDPROC));
			SetWindowLong(m_ListBox, GWL_WNDPROC, reinterpret_cast<long>(ComboBoxListBoxProc));
		}
		if(! m_bAlertBkg)pDC->SetBkColor(COLOR_WHITE);
		else
		{
			pDC->SetBkColor(COLOR_ALERT);
			hbr = m_hBrushAlert;
		}
	}

	pDC->SetBkMode(TRANSPARENT);

	// TODO: Return a different brush if the default is not desired

	return hbr;
}

class CMyComboBox : public CComboBox
{
// ...
afx_msg HBRUSH CtlColor(CDC* pDC, UINT nCtlColor);
// ...
};

//...
   ON_WM_CTLCOLOR_REFLECT()
   //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyComboBox message handlers

HBRUSH CMyComboBox::CtlColor(CDC* pDC, UINT nCtlColor) 
{
   HBRUSH hBrush = NULL;
   switch(nCtlColor)
   {
   case CTLCOLOR_EDIT:
      {
         pDC->SetBkColor(RGB(255, 0, 0));
         pDC->SetTextColor(RGB(255, 255, 255));
         hBrush = m_brush;
      }
      break;
   //...
   }
   return hBrush;
}

class MyMap {
    std::map<int,int> m_map;
    std::list<pair<int,int> > m_list;
public:
    typedef std::list<pair<int,int> >::iterator insert_iterator;
    typedef std::map<int,int>::iterator key_iterator;
    void insert(int key, int value) {
        m_list.push_back(m_map.insert(pair<int,int>(key, value)));
    }
    insert_iterator ibegin() { return m_list.begin(); }
    insert_iterator iend() { return m_list.end(); }
    key_iterator kbegin() { return m_map.begin(); }
    key_iterator kend() { return m_map.end(); }
};

MyMap mymap;
mymap.insert(5, 15);
mymap.insert(100, 20);
mymap.insert(34, 30);
for (MyMap::key_iterator kit = mymap.kbegin(); kit != mymap.kend(); ++kit)
    std::cout << (*kit).second << std::endl; // prints 15 30 20
for (MyMap::insert_iterator it = mymap.ibegin(); it != mymap.iend(); ++it)
    std::cout << (*(*it)).second << std::endl; // prints 15 20 30

wchar_t sqlCommand[1024];
wsprintf(sqlCommand, L"ALTER TABLE TableIn ADD %s nvarchar(20)", Value);