Date Time Picker control for the MFC Grid Control

void CInPlaceDateTime::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	if( (nChar == VK_TAB) || 
        (( (nChar == VK_PRIOR) || (nChar == VK_NEXT) ||
		   (nChar == VK_DOWN)  || (nChar == VK_UP)   ||
		   (nChar == VK_RIGHT) || (nChar == VK_LEFT) ) &&
		 ( m_bExitOnArrows || (GetKeyState( VK_CONTROL ) < 0) )) )
	{
		m_nLastChar = nChar;
		GetParent()->SetFocus();
		return;
	}
 
	CDateTimeCtrl::OnKeyDown(nChar, nRepCnt, nFlags);
}
 
//Tab only processed on key down so we don't get double-tabbed
void CInPlaceDateTime::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	if (/*nChar == VK_TAB ||*/ nChar == VK_RETURN || nChar == VK_ESCAPE)
	{
		m_nLastChar = nChar;
		GetParent()->SetFocus();    // This will destroy this window
		return;
	}
 
	CDateTimeCtrl::OnKeyUp(nChar, nRepCnt, nFlags);
}

void CInPlaceDateTime::OnKillFocus(CWnd* pNewWnd) 
{
   HWND				pCalWnd;
 
   // if focus goes to CMonthCalCtrl from inside ...
   // just ignore it
   pCalWnd = (HWND)SendMessage( DTM_GETMONTHCAL );
   if( pNewWnd->GetSafeHwnd() == pCalWnd ) {
      return;
   }
   CDateTimeCtrl::OnKillFocus(pNewWnd);
 
   if (GetSafeHwnd() == pNewWnd->GetSafeHwnd()) {
      return;
   }
   EndEdit();
}