Localize the CDateTimeCtrl, CMonthCalCtrl, SysDateTimePick32 to the Brazilian Portuguese locale.

Quote:

A DTP control tracks locale changes when it is using the default format string. If you set a custom format string, it will not be updated in response to locale changes.

class CMyDateTimeCtrl : public CDateTimeCtrl
{
	DECLARE_DYNAMIC(CMyDateTimeCtrl)
public:
// ...
	void Init(const COleDateTime& dt);
// ...
protected:
	COleDateTime	m_dt;

	afx_msg void	OnDtnFormat(NMHDR *pNMHDR, LRESULT *pResult);
	afx_msg void	OnDtnFormatQuery(NMHDR *pNMHDR, LRESULT *pResult);
};

BEGIN_MESSAGE_MAP(CMyDateTimeCtrl, CDateTimeCtrl)
	ON_NOTIFY_REFLECT(DTN_FORMAT, OnDtnFormat)
	ON_NOTIFY_REFLECT(DTN_FORMATQUERY, OnDtnFormatQuery)
END_MESSAGE_MAP()

void CMyDateTimeCtrl::Init(const COleDateTime& dt)
{
	// Must set the value before the format.
	// The format callback handlers need a valid date/time!
	m_dt = (dt.GetStatus() == COleDateTime::valid) ? dt : COleDateTime::GetCurrentTime();
	VERIFY(SetTime(m_dt));
	VERIFY(SetFormat(_T("X"));
}

void CMyDateTimeCtrl::OnDtnFormat(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMDATETIMEFORMAT pDTFormat = reinterpret_cast<LPNMDATETIMEFORMAT>(pNMHDR);
	pDTFormat->szDisplay[0] = _T('\0'); // 64 character buffer
	// Create string here passing the locale, the format, and 
	//  m_dt.GetAsSystemTime() to GetDateFormat(Ex) or GetTimeFormat(Ex) resp. 
	// The format string can be hard coded or retrieved using GetLocaleInfo(Ex).
	*pResult = 0;
}

void CMyDateTimeCtrl::OnDtnFormatQuery(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMDATETIMEFORMATQUERY pDTFmtQuery = reinterpret_cast<LPNMDATETIMEFORMATQUERY>(pNMHDR);

	// Set pDTFmtQuery->szMax.cx and pDTFmtQuery->szMax.cy here
	
	// Dynamic calculation (LPCTSTR lpszMaxText is max. length text):
	CDC * pDC = GetDC();
	CFont * pFont = GetFont();
	CFont Font;
	if (!pFont)
	{
		VERIFY(Font.CreateStockObject(DEFAULT_GUI_FONT));
		pFont = &Font;
	}
	CFont * pOrigFont = pDC->SelectObject(pFont);
	VERIFY(::GetTextExtentPoint32(pDC->m_hDC,
		lpszMaxText, _tcslen(lpszMaxText),
		&pDTFmtQuery->szMax));
	pDC->SelectObject(pOrigFont);
	ReleaseDC(pDC);
	*pResult = 0;
}}