如何用directshow截屏啊？

[zdy0155]

我想做个文档共享的程序，怎样用directshow截屏，怎样把变化的屏幕部分截取到呢，
不用directshow还有什么好的方法么，

[zdy0155]

怎么调用excel 保存成html????

_Application ExcelApp;
Workbooks wbsMyBooks;
_Workbook wbMyBook;
Worksheets wssMysheets;
_Worksheet wsMysheet;
Range rgMyRge;

CComVariant FileName(_T("C:\\2.html")); //文件名
CComVariant FileFormat(8); //重点，看下面的说明
CComVariant LockComments(false),Password(_T(""));
CComVariant AddToRecentFiles(false),WritePassword(_T(""));
CComVariant ReadOnlyRecommended(false),EmbedTrueTypeFonts(false);

CComVariant SaveNativePictureFormat(false),SaveFormsData(false);
CComVariant SaveAsAOCELetter(false);



if (!ExcelApp.CreateDispatch("Excel.Application",NULL))
{
AfxMessageBox("创建Excel服务失败!");
exit(1);
}
ExcelApp.SetVisible(true);
wbsMyBooks.AttachDispatch(ExcelApp.GetWorkbooks(),true);
wbMyBook.AttachDispatch(wbsMyBooks.Add(_variant_t("c:\\test.xls")));
COleVariant covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR);
//wbMyBook.SaveAs(COleVariant(),FileFormat,covOptional,covOptional,covOptional,covOptional,0, covOptional,covOptional,covOptional,covOptional); ??参数怎么设置啊？？？


wbMyBook.SaveAs(FileName,FileFormat,LockComments,Password,
AddToRecentFiles,covOptional,1,
EmbedTrueTypeFonts,SaveNativePictureFormat,SaveFormsData,
SaveAsAOCELetter);
//AfxMessageBox("asdf");
rgMyRge.ReleaseDispatch();
wsMysheet.ReleaseDispatch();
wssMysheets.ReleaseDispatch();
wbMyBook.ReleaseDispatch();
wbsMyBooks.ReleaseDispatch();

//ExcelApp.Quit();
ExcelApp.ReleaseDispatch();