delphi编程实现获取本地HTML文件的标题，超级链接

本文用于提取本地网页的标签元素如<TITLE></TITLE>,<IMG>,<A></A>...的内容，非常实用于批量文件的操作，这是按一般文件进行文本查找替换无法比拟的，,而这是使用TWEBBROWSER控件无法做到的。类似的，
你可以把本地的HTML文件转换成MHT文件（这是个大家觉得很棘手的问题，本人已经搞定)。

//uses activex,mshtml

function Html_GetTitleFromFile(const HtmlFile:TFileName;var FileTitle:String):Boolean;
var
Idoc : IHtmlDocument2;
//ElementGroup : IhtmlElementCollection;
//HtmlItem: IHTMLElement;
PersistFile: IPersistFile;
begin
Result:=False;
if not fileexists(HtmlFile) then
exit;
FileTitle:='';

try
Idoc := CreateComObject(Class_HTMLDOcument) as IHTMLDocument2;
PersistFile := IDoc as IPersistFile;
if PersistFile.Load(StringToOleStr(HTMLFile),1)<>S_OK then
exit;
IDoc.designMode := 'on'; //This will disable script execution.
{ while IDoc.readyState <> 'complete' do //if it dead here,how to do it?
begin
application.ProcessMessages;
end;
}
// Showmessage(IDoc.readyState);
Application.ProcessMessages;
sleep(1000);
// Showmessage(IDoc.readyState);
if IDoc.readyState<>'complete' then
begin
Application.ProcessMessages;
sleep(1000);
end;
if IDoc.readyState<>'complete' then
begin
IDoc:=nil;
Result:=False;
exit;
end;
Result:=True;
FileTitle:=IDoc.title;
{ //This code also works
ElementGroup:=IDoc.all.tags('TITLE') As IhtmlElementCollection;
HtmlItem:=ElementGroup.item(0,0) As IHtmlElement;
FileTitle:=HtmlItem.innerText;
}

finally
IDoc := nil;
end;
end;