printscreen in Windows/CE/Mobile

在windows CE/Windows Mobile上用程序截屏

// totally from web

HBITMAP CopyScreenToBitmap(int &nWidth,int
&nHeight)

{

// 屏幕和内存设备描述表

HDC hScrDC, hMemDC;


// 位图句柄

HBITMAP hBitmap, hOldBitmap;


// 屏幕分辨率

int xScrn, yScrn;


//为屏幕创建设备描述表

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

//为屏幕设备描述表创建兼容的内存设备描述表

hMemDC = CreateCompatibleDC(hScrDC);

// 获得屏幕分辨率

xScrn = GetDeviceCaps(hScrDC, HORZRES);

yScrn = GetDeviceCaps(hScrDC, VERTRES);

//存储屏幕的长宽

nWidth = xScrn;

nHeight = yScrn;

// 创建一个与屏幕设备描述表兼容的位图

hBitmap = CreateCompatibleBitmap(hScrDC, xScrn, yScrn);

// 把新位图选到内存设备描述表中

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

// 把屏幕设备描述表拷贝到内存设备描述表中

BitBlt(hMemDC, 0, 0, xScrn,yScrn,hScrDC, 0, 0, SRCCOPY);

//得到屏幕位图的句柄

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

//清除

DeleteDC(hScrDC);

DeleteDC(hMemDC);

// 返回位图句柄

return hBitmap;

}

void
CCopyScreenDlg::OnBtnsnap()

{

// TODO: Add your control notification handler code here

HBITMAP bmp;

int nWidth,nHeight;

//抓取屏幕

bmp = CopyScreenToBitmap(nWidth,nHeight);

//将抓取的屏幕压缩显示到窗体上

CDC *pDC = new CClientDC(this);

CDC srcDC;

CRect rect;

this->GetClientRect(&rect);

rect.DeflateRect(0,20);

//绘制显示区域矩形

CPen pen;

pen.CreatePen(PS_SOLID,2,RGB(0,255,255));

pDC->SelectObject(&pen);

pDC->Rectangle(rect);

//显示屏幕

srcDC.CreateCompatibleDC(pDC);

srcDC.SelectObject(bmp);

pDC->StretchBlt(rect.left+2,rect.top+2,rect.right -
rect.left - 4 ,rect.bottom - rect.top -
4,&srcDC,0,0,nWidth,nHeight,SRCCOPY);

DeleteObject(bmp);

}