thank you, man
It is the absence of BOM that confuse me,  when I test the same program with 
non-ANSI string, everything is fine, maybe I should add the BOM myself.

"Anthony Jones" wrote:

> "YeJianWei" <YeJianWei@d...> wrote in message 
> news:44F7E77E-46EA-4E08-8AA0-34206EC6796D@m......
> > Hi, guys, I had a problem with MSXML.
> > I was trying to create a xml document in memory and save it as a utf-8
> > encoding file to disk, but I ended up with a ANSI encoding file:(, here is
> > the code:
> >
> > #import "msxml4.dll"
> > using namespace MSXML2;
> >
> > MSXML2::IXMLDOMDocumentPtr pXMLDoc;
> > pXMLDoc.CreateInstance( __uuidof(MSXML2::DOMDocument40) );
> > pXMLDoc->loadXML( L"<?xml version=\"1.0\" encoding=\"utf-8\"
> > ?>\r\n<root>\r\n</root>" );
> > pXMLDoc->save( _variant_t("D:\\1.XML") );
> >
> > I run this program under windows 2003 server R2 Simplied Chinese version
> > with MSXML 4.0 SP2
> 
> How do you know that it isn't ANSI encoding?  MSXML save does not include a 
> BOM at the start of the file.  It 1) uses the encoding attribute of the xml 
> declare to detemine the encoding of the file or 2) assumes UTF-8 as the 
> default.
> 
> However unless you include in the content characters outside of the ASCII 
> range you won't be able to tell the difference.  I think you'll find it is 
> using the UTF-8 encoding.
> 
> 
> -- 
> Anthony Jones - MVP ASP/ASP.NET
> 
>