C / C++ / MFC

void CCommunicationView::OnCustomDrawLog(NMHDR* pNMHDR, LRESULT* pResult)
{
	NMLVCUSTOMDRAW *pLVCD = reinterpret_cast<NMLVCUSTOMDRAW*>(pNMHDR);
	
	*pResult = CDRF_DODEFAULT;			// assume normal windows drawn control
	
	if (CDDS_PREPAINT == pLVCD->nmcd.dwDrawStage)
	{
		*pResult = CDRF_NOTIFYITEMDRAW;
	}
	else if (CDDS_ITEMPREPAINT == pLVCD->nmcd.dwDrawStage)
	{
		// this is the prepaint stage, we need each sub-item pre-paint
		*pResult = CDRF_NOTIFYSUBITEMDRAW;
	}
	else if ((CDDS_ITEMPREPAINT | CDDS_SUBITEM) == pLVCD->nmcd.dwDrawStage)
	{
		// now render the image if it has one
		int		item = pLVCD->nmcd.dwItemSpec;
		LVITEM rItem;
        ZeroMemory(&rItem, sizeof(LVITEM));
        rItem.mask = LVIF_IMAGE | LVIF_STATE;
        rItem.iItem = item;
        rItem.stateMask = LVIS_SELECTED;
        m_Log.GetItem(&rItem );
		// we render the text ourselves in the right colour and take tabs into account
		int		value = m_Log.GetItemData(item);
		CDC*	pDC = CDC::FromHandle ( pLVCD->nmcd.hdc );
		CRect	rcText;
		CRect	rcIcon;
		CString	text;
		
		m_Log.GetItemRect(item, &rcIcon, LVIR_ICON);
		m_Log.GetItemRect(item, &rcText, LVIR_BOUNDS);
		rcText.left += rcIcon.Width();

		text = m_Log.GetItemText(item, 0);
		if (rItem.state & LVIS_SELECTED)
		{
			pDC->SetTextColor(GetSysColor(COLOR_HIGHLIGHTTEXT));
			CBrush	brush(GetSysColor(COLOR_HIGHLIGHT));
			pDC->FillRect(rcText, &brush);
		}
		else
		{
			pDC->SetTextColor(value);
			CBrush	brush(GetSysColor(COLOR_HIGHLIGHTTEXT));
			pDC->FillRect(rcText, &brush);
		}
		pDC->DrawText(text, rcText, DT_END_ELLIPSIS | DT_EXPANDTABS | DT_SINGLELINE | DT_VCENTER);
		pLVCD->clrText = value;
		m_ilLog.Draw(pDC, rItem.iImage, rcIcon.TopLeft(), ILD_TRANSPARENT);
		*pResult = CDRF_SKIPDEFAULT;
	}
}

int global_int;<br />
...<br />
<br />
void CDialogA::OnOk()<br />
{<br />
...<br />
global_int=5;<br />
...<br />
}

extern int global_int;<br />
...<br />
void CDialogB::OnQuestion()<br />
{<br />
...<br />
int number=global_int;<br />
...<br />
}

<br />
int global_int;<br />
...<br />
<br />
void CDialogA::OnOk()<br />
{<br />
...<br />
global_int=5;<br />
...<br />
}

<br />
extern int global_int;<br />
...<br />
void CDialogB::OnQuestion()<br />
{<br />
...<br />
int number=global_int;<br />
...<br />
}