IDB_BG 是點陣圖資源的ID

方法一 OnEraseBkgnd(CDC* pDC)

{

// 設定畫刷為希望的背景

CDC backBmp;

backBmp.CreateCompatibleDC(pDC);

CBitmap bitmap;

bitmap.LoadBitmap(IDB_BG);

CBrush m_brushBackground;

m_brushBackground.CreatePatternBrush(&bitmap); ///建立點陣圖畫刷

CBrush* pOldMemDCBrush = pDC->SelectObject(&m_brushBackground);

pDC->PatBlt(0, 0, m_ScrollRect.Width(), m_ScrollRect.Height(), PATCOPY);

pDC->SelectObject(pOldMemDCBrush);

return TRUE;

}

方法二 OnEraseBkgnd(CDC* pDC)

{

CBitmap m_pMap;

m_pMap.LoadBitmap(IDB_BG);

CRect rect;

GetClientRect(&rect);

BITMAP bm;

CDC dcMem;

m_pMap.GetObject(sizeof(BITMAP), &bm);

dcMem.CreateCompatibleDC(pDC);

CBitmap* pOldBitmap = dcMem.SelectObject(&m_pMap);

for (register int nX = 0; nX < rect.right - rect.left; nX += bm.bmWidth)

for (int nY = 0; nY < rect.bottom - rect.top; nY += bm.bmHeight)

pDC->BitBlt(nX, nY, bm.bmWidth, bm.bmHeight, &dcMem, 0, 0, SRCCOPY);

dcMem.SelectObject(pOldBitmap);

return TRUE;

}

方法三 OnEraseBkgnd(CDC* pDC)

{

CBitmap bmp;

bmp.LoadBitmap(IDB_BG); ///載入點陣圖

CBrush m_brushBackground;

m_brushBackground.CreatePatternBrush(&bmp); ///建立點陣圖畫刷

CRect rect;

GetClientRect(&rect);

pDC->FillRect(rect, &m_brushBackground); //用背景畫填充區域

return TRUE;

}