MFC(如何将视图窗口中的自绘图,以图片方式保存最好是.BMP格式!)，急求！！！立即给分
如何将视图窗口中的自绘图,以图片方式保存最好是.BMP格式!并且保存的图片要刚好是客户区范围之内的，同时因为我的图形会随时放大，所以也要不停的进行删除内存中保存的图片的和重新生成，请问怎么办？？/
比如,我在图口中画了一个三角形,两个圆如何把他们保存成图形文件?
[解决办法]
void CXXXView::SaveToBmp()
{
BITMAPINFO bi;//信息头
void *pBits=NULL;
CRect rect;//客户区窗口
GetClientRect(&rect);
int nWidth=rect.right;
int nHeight=rect.bottom;
//填充信息头
ZeroMemory(&bi,sizeof(bi));
bi.bmiHeader.biSize=sizeof(bi.bmiHeader);
bi.bmiHeader.biHeight=nHeight;
bi.bmiHeader.biWidth=nWidth;
bi.bmiHeader.biPlanes=1;
bi.bmiHeader.biBitCount=24;
bi.bmiHeader.biCompression=BI_RGB;
bi.bmiHeader.biSizeImage=3*nWidth*nHeight;
//拷贝客户区至内存DC
HDC hActiveDC=::GetDC(this-> m_hWnd);
HDC hActiveWndCompatibleDC=CreateCompatibleDC(hActiveDC);
HBITMAP hActiveWndCompactibleBitmap=CreateCompatibleBitmap(hActiveDC,rect.right,rect.bottom);
SelectObject(hActiveWndCompatibleDC,hActiveWndCompactibleBitmap);
BitBlt(hActiveWndCompatibleDC,0,0,rect.right,rect.bottom,hActiveDC,0,0,SRCCOPY);
//保存内存DC
HDC hBmpFileDC=CreateCompatibleDC(hActiveWndCompatibleDC);
HBITMAP hBmpFileBitmap=CreateDIBSection(hActiveWndCompatibleDC,&bi,DIB_RGB_COLORS,&pBits,NULL,0);
SelectObject(hBmpFileDC,hBmpFileBitmap);
BitBlt(hBmpFileDC,0,0,nWidth,nHeight,hActiveWndCompatibleDC,0,0,SRCCOPY);
CString tempFileName=_T( "test.bmp ");//目标文件名
CFileDialog dlg(FALSE, _T( "bmp "), _T( "Temp.bmp "), OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT, _T( "Bitmap Files (*.bmp)|*.bmp|All Files (*.*)|*.*|| "), this);
if(dlg.DoModal() == IDOK)
{
tempFileName=dlg.GetPathName();
}
HANDLE hFile=CreateFile(tempFileName,GENERIC_WRITE,FILE_SHARE_WRITE,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
if(hFile!=INVALID_HANDLE_VALUE)
{
DWORD dwRet=0;
//填充文件头
BITMAPFILEHEADER bmfHeader;
ZeroMemory(&bmfHeader,sizeof(bmfHeader));
bmfHeader.bfOffBits=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER);
bmfHeader.bfSize=bi.bmiHeader.biSizeImage+bmfHeader.bfOffBits;
bmfHeader.bfType= 'MB ';
WriteFile(hFile,&bmfHeader,sizeof(bmfHeader),&dwRet,NULL);
WriteFile(hFile,&bi.bmiHeader,sizeof(bi.bmiHeader),&dwRet,NULL);
WriteFile(hFile,pBits,bi.bmiHeader.biSizeImage,&dwRet,NULL);
CloseHandle(hFile);
}
}
