利用IPersist接口可以实现保存HTML到文件，在VB和Delphi下的实现是这样的：

VB:

Dim oPF As IPersistFile
Set oPF = WebBrowser1.Document
oPF.Save \"TheFileNameHere.htm\", False

Delphi:

uses
MSHTML,OleCtrls, SHDocVw, StdCtrls,ActiveX;
function GetHTMLCode(WB: IWebbrowser2; ACode: TStrings): Boolean;
var
ps: IPersistStreamInit;
s: string;
ss: TStringStream;
sa: IStream;
begin
ps := WB.document as IPersistStreamInit;
s := ´´;
ss := TStringStream.Create(s);
try
sa:= TStreamAdapter.Create(ss, soReference) as IStream;
Result := Succeeded(ps.Save(sa, Bool(True)));
if Result then ACode.Add(ss.Datastring);
finally
ss.Free;
end;
end;

至于VC下的实现方法，可以参考蒋晟的这篇文章：

另外VB地实现需要引用ole_lib，这个引用在 下载