CMonthCalCtrl::GetRange

Retrieves the current minimum and maximum dates set in a month calendar control.

DWORD GetRange(
   COleDateTime* pMinRange,
   COleDateTime* pMaxRange 
) const;
DWORD GetRange(
   CTime* pMinRange,
   CTime* pMaxRange 
) const;
DWORD GetRange(
   LPSYSTEMTIME pMinRange,
   LPSYSTEMTIME pMaxRange 
) const;

Parameters

• pMinRange
  A pointer to a COleDateTime object, a CTime object, or SYSTEMTIME structure containing the date at the lowest end of the range.

• pMaxRange
  A pointer to a COleDateTime object, a CTime object, or SYSTEMTIME structure containing the date at the highest end of the range.

Return Value

A DWORD that can be zero (no limits are set) or a combination of the following values that specify limit information.

Remarks

This member function implements the behavior of the Win32 message MCM_GETRANGE, as described in the Windows SDK. In MFC's implementation of GetRange, you can specify a COleDateTime usage, a CTime usage, or a SYSTEMTIME structure usage.

Example

// This code fragment sets a variety of ranges in the
// control, and calls a separate function to show the
// set range to the user.

void CMonthCalDlg::OnBnClickedRangebutton()
{
   // set minimum of January 1st, 1995 with no maximum
   COleDateTime dtMin;
   COleDateTime dtMax;

   dtMin = COleDateTime(1995, 1, 1, 0, 0, 0);
   dtMax.SetStatus(COleDateTime::null);
   m_calCtrl1.SetRange(&dtMin, &dtMax);
   ShowRange(&m_calCtrl1);

   // set no minimum and a maximum of September 30th, 1997
   dtMin.SetStatus(COleDateTime::null);
   dtMax = COleDateTime(1997, 9, 30, 0, 0, 0);
   m_calCtrl1.SetRange(&dtMin, &dtMax);
   ShowRange(&m_calCtrl1);

   // set minimum of April 15, 1992 and maximum of June 5, 2002
   dtMin = COleDateTime(1992, 4, 15, 0, 0, 0);
   dtMax = COleDateTime(2002, 6, 5, 0, 0, 0);
   m_calCtrl1.SetRange(&dtMin, &dtMax);
   ShowRange(&m_calCtrl1);
}

void CMonthCalDlg::ShowRange(CMonthCalCtrl* pMoCalCtrl)
{
   ASSERT(pMoCalCtrl != NULL);
   CString strMessage;
   COleDateTime dtMinimum;
   COleDateTime dtMaximum;

   // Get the range
   DWORD dwResult = pMoCalCtrl->GetRange(&dtMinimum, &dtMaximum);

   // If a minimum was specified, format it
   // otherwise, indicate that there is no lower bound
   if (dwResult & GDTR_MIN)
      strMessage += dtMinimum.Format(_T("Minimum range is %x %X.\r\n"));
   else
      strMessage += _T("No minimum range.\r\n");

   // Treat maximum similarly
   if (dwResult & GDTR_MAX)
      strMessage += dtMaximum.Format(_T("Maximum range is %x %X.\r\n"));
   else
      strMessage += _T("No maximum range.\r\n");

   // Show the user
   AfxMessageBox(strMessage);
}

Requirements

Header: afxdtctl.h

See Also

Reference

CMonthCalCtrl Class

Hierarchy Chart

CMonthCalCtrl::SetRange

Other Resources

CMonthCalCtrl Members