CDC::FromHandle要不要释放资源

2007-12-04 10:25:43 1.4k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

一步一步搭建S32K14x的AutoSar项目----S32DS 代码工程的搭建一步一步搭建S32K14X的AutoSar项目----S32DS代码工程的搭建阅读详情



void CButtonEx::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)

{

	CDC *pDC=CDC::FromHandle(lpDrawItemStruct->hDC);

	CRect m_rect;

	m_rect=lpDrawItemStruct->rcItem;

	CMemDC m_pDC(pDC);



	pDC->SelectObject(&font);

	CString text;

	GetWindowText(text);

	m_pDC.SelectObject(&font);

	switch(m_Status)

	{

	case NORMAL:

		{

			CBitmap bitmap;

			bitmap.LoadBitmap(IDB_BUTTON_NORMAL);

			CDC memdc;

			memdc.CreateCompatibleDC(NULL);

			memdc.SelectObject(&bitmap);

			m_pDC.BitBlt(0,0,m_rect.Width(),m_rect.Width(),&memdc,0,0,SRCCOPY);	

			m_pDC.SetBkMode(TRANSPARENT);

			m_pDC.DrawText(text,&m_rect,DT_VCENTER|DT_SINGLELINE|DT_CENTER);

			memdc.DeleteDC();

		}

		break;

	case HOVER:

		{

			CBitmap bitmap;

			bitmap.LoadBitmap(IDB_BUTTON_HOVER);

			CDC memdc;

			memdc.CreateCompatibleDC(NULL);

			memdc.SelectObject(&bitmap);

			m_pDC.BitBlt(0,0,m_rect.Width(),m_rect.Width(),&memdc,0,0,SRCCOPY);	

			m_pDC.SetBkMode(TRANSPARENT);

			m_pDC.DrawText(text,&m_rect,DT_VCENTER|DT_SINGLELINE|DT_CENTER );

			memdc.DeleteDC();

		}

		break;

	case DOWN:

		{

			CBitmap bitmap;

			bitmap.LoadBitmap(IDB_BUTTON_DOWN);

			CDC memdc;

			memdc.CreateCompatibleDC(NULL);

			memdc.SelectObject(&bitmap);

			m_pDC.BitBlt(0,0,m_rect.Width(),m_rect.Width(),&memdc,0,0,SRCCOPY);	

			m_pDC.SetBkMode(TRANSPARENT);

			m_pDC.DrawText(text,&m_rect,DT_VCENTER|DT_SINGLELINE|DT_CENTER );

			memdc.DeleteDC();



		}

		break;

	default:

		{



		}

		break;

	}

}