怎么利用代码调用webbrowser控件中右键菜单的查看源代码功能

[AFUSOFT]

如题

[xiaoxiaobai]

const
CGID_WebBrowser: TGUID = '{ED016940-BD5B-11cf-BA4E-00C04FD70816}';
var
CmdTarget : IOleCommandTarget;
vaIn, vaOut: OleVariant;
PtrGUID: PGUID;
begin
New(PtrGUID);
PtrGUID^ := CGID_WebBrowser;
with WebBrowser1 do
if Document <> nil then
try
Document.QueryInterface(IOleCommandTarget, CmdTarget);
if CmdTarget <> nil then
try
CmdTarget.Exec( PtrGUID, HTMLID_VIEWSOURCE, 0, vaIn, vaOut);
finally
CmdTarget._Release;
end;
except
// Nothing
end;
Dispose(PtrGUID);
end;