在mfc編程中，如何編程保存視圖區為BMP格式的圖像

把srcDC換成妳要保存的窗口的DC就行：

HBITMAP CopyScreenToBitmap(LPRECT lpRect)

{

int m_xScreen = GetSystemMetrics(SM_CXSCREEN);

//獲取y方向屏幕像素()

int m_yScreen = GetSystemMetrics(SM_CYSCREEN);

HDC hScrDC,hMemDC;

HBITMAP hBitmap,hOldBitmap;

int nX1,nX2,nY1,nY2;

int nWidth,nHeight;

if (IsRectEmpty(lpRect))

{

return FALSE;

}

//為屏幕創建設備描述表

hScrDC = CreateDC("DISPLAY",NULL,NULL,NULL);

//為屏幕設備描述表創建兼容的內存設備描述表

hMemDC = CreateCompatibleDC(hScrDC);

// 獲得選定區域坐標

nX1 = lpRect->left;

nY1 = lpRect->top;

nX2 = lpRect->right;

nY2 = lpRect->bottom;

//確保選定區域是可見的

if (nX1 < 0)

nX1 = 0;

if (nY1 < 0)

nY1 = 0;

if (nX2 > m_xScreen)

nX2 = m_xScreen;

if (nY2 > m_yScreen)

nY2 = m_yScreen;

nWidth = nX2 - nX1;

nHeight = nY2 - nY1;

// 創建壹個與屏幕設備描述表兼容的位圖

hBitmap = CreateCompatibleBitmap(hScrDC,nWidth,nHeight);

// 把新位圖選到內存設備描述表中

hOldBitmap = (HBITMAP)SelectObject(hMemDC,hBitmap);

// 把屏幕設備描述表拷貝到內存設備描述表中

BitBlt(hMemDC,0,0,nWidth,nHeight,hScrDC,nX1,nY1,SRCCOPY);

//得到屏幕位圖的句柄

hBitmap = (HBITMAP)SelectObject(hMemDC,hOldBitmap);

//清除

DeleteDC(hScrDC);

DeleteDC(hMemDC);

return hBitmap;

}