怎样截取CView中显示的内容,该怎么解决

怎样截取CView中显示的内容
我现在想把CView中显示的内容截取成一个位图，应该怎么做啊？用pDC->getcurrentbitmap截取下来的是什么啊？麻烦哪位给我解答一下，不胜感激~~~~~

------解决方案--------------------
参考一下下面这段将视图内容导出为bmp图像的代码：

void CGraphSoftView::OnFileExport() 
{
// TODO: Add your command handler code here
CClientDC dc(this);
CDC memDC;
CRect rect;
GetClientRect(rect);

memDC.CreateCompatibleDC(&dc);
CBitmap bm;
int Width = rect.Width();
int Height = rect.Height();
bm.CreateCompatibleBitmap(&dc, Width, Height);
CBitmap* pOld = memDC.SelectObject(&bm);
memDC.BitBlt(0, 0, Width, Height, &dc, 0, 0, SRCCOPY);
memDC.SelectObject(pOld);
BITMAP btm;
bm.GetBitmap(&btm);
DWORD size = btm.bmWidthBytes * btm.bmHeight;
LPSTR lpData = (LPSTR)GlobalAllocPtr(GPTR, size);

BITMAPFILEHEADER bfh;
/////////////////////////////////////////////
BITMAPINFOHEADER bih;
bih.biBitCount = btm.bmBitsPixel;
bih.biClrImportant = 0;
bih.biClrUsed = 0;
bih.biCompression = 0;
bih.biHeight = btm.bmHeight;
bih.biPlanes = 1;
bih.biSize = sizeof(BITMAPINFOHEADER);
bih.biSizeImage = size;
bih.biWidth = btm.bmWidth;
bih.biXPelsPerMeter = 0;
bih.biYPelsPerMeter = 0;
GetDIBits(dc,bm,0,bih.biHeight,lpData,(BITMAPINFO*)&bih,DIB_RGB_COLORS);
bfh.bfReserved1 = bfh.bfReserved2 = 0;
bfh.bfType = ((WORD)('M'<< 8)|'B');
bfh.bfSize = 54 + size;
bfh.bfOffBits = 54;

CFileDialog dlg(false,_T("BMP"),_T("*.bmp"),OFN_OVERWRITEPROMPT,_T("*.bmp|*.bmp|*.lld|*.lld|*.*|*.*|"));
if (dlg.DoModal()==IDOK)
{
if(dlg.GetFileExt()=="bmp"){
CFile bf;
CString ss=dlg.GetPathName();
if(bf.Open(ss, CFile::modeCreate | CFile::modeWrite))
{
bf.WriteHuge(&bfh, sizeof(BITMAPFILEHEADER));
bf.WriteHuge(&bih, sizeof(BITMAPINFOHEADER));
bf.WriteHuge(lpData, size);
bf.Close();
CString str;
str.LoadString(IDS_STRING_SAVE_SUCCESS);
AfxMessageBox(str);
}
}else if(dlg.GetFileExt()=="lld"){
FILE *OutStream;
OutStream = fopen(dlg.GetPathName(), "w" );
GetDocument()->ExPort(OutStream);

fclose(OutStream);
}
}
GlobalFreePtr(lpData);
}