First off, I'm disappointed with MSDN support and Microsoft's XP/SP2.

The issue is that XP/SP2 introduced a new security feature which breaks
code. This security feature is called the "Local Machine Zone Lockdown". See
this URL for more information:


I'm disappointed that MSDN support, that I found this out painfully over the
past week since I started posting problems with the RES Protocol, SCRIPT
Tags, and the CDHtmlDialog class in this forum, and got no response. I also
posted this issue with the Internet Development Forum, as I could reproduce
the issue simply between a Java Script file stored in an EXE that used the
RES Protocol to be in turn used by a SCRIPT tag in a HTML file, and again,
got no response.

I'm disappointed with XP/SP2 in that the errors from Internet Explorer and
the CDHtmlDialog do not accurate reflect anything about "Local Machine Zone
Lockdown", and leave not only developers in the dark as what to do, but also
end users.

At any rate, this "Local Machine Zone Lockdown" basically makes it so that
all files on your local machine now have a kind of "Zone" security control
over them. Where the "Zone" is similar to "Internet", "Intranet", and
"Trusted Sites" zones as one would see in IE's Tools - Internet Options -
Security Tab. This is the precursor to letting Microsoft control not only who
can do what to legacy files and resources, but which legacy programs can do
what to legacy files and resources. It doesn't exactly work that way, but it
accomplishes it 100% for SCRIPT tags, and "active content" that would run
under Internet Explorer. This is my "layman's" explanation.

Before XP/SP2, one could use IE to bring up Java Script from the RES
Procotol from a local HTML file without any hinderance as such:

======= C:\SomeLocalPlacve\MyHtm.htm ======
<script language="javascript" src='res://MyApp.exe/"MY_SCRIPT"'>
<script language="javascript">
window.onload = function()

In turn, the MY_SCRIPT would come from a local EXE called MyApp.exe who used
the RES protocol to expose the script as such:

======Java Script include in a local EXE called

And finally, the script in the actual TEXT file for the Java Script would be
somethign like this:

function RunMyFun()
alert("Hello World!");

This would work 100% fine on XP before SP2. After SP2, Internet Explorer 7,
would give a run time error on the RunMYFun, saying object does not exist. If
this HTML was launched from a CDHtmlDialog based class, it would give an
error saying invalid character line 2.

Now, here is the funny this, which that link explains. The IWebBrowser
control and HTA files are not affected by this "Local Machine Zone Lockdown".
And sure enough, the same code would work, if MyHtm.htm was renamed MyHta.hta
and setupo internally to be a TRUE-HTA file. And likewise, if the IWebBrowser
control was used instead of CDHtmlDialog, it also would work, on a XP/SP2.

Because these errors are so misleading, one would never deduce that the true
culprit was "Local Machine Zone Lockdown". And that is a Microsoft/XP/SP2
issue. But worse, and in my opinion, the CDHtmlDialog should not have been
subject to this issue, or at the least, should have its documentation changed
to imply that what ever security one's Internet Explorer is running on, is
how CDHtmlDialog will behave. I'd even dare say, that the CDHtmlDialog should
either not be subject to IE's security, and/or default it to use the
IWebBrowser without being subject to the security, and give an option for one
to go out of their way to set it up.

At any rate, the link above mentions work arounds, and even suggest if one's
application depends on not being hindered by the "Local Machine Zone
Lockdown", to switch it to an HTA, use the IWebBrowser, "Insert a mark of the
web" , or add one's application to a regitry key. I also found that
supposedly in the IE Tools - Internet Options - Advanced - Security section
are 3 "Allow Active Content~~~" checkboxes to let one's PC allow SCRIPT Tags
to work.

The HTA and IWebBrowser I can testify work. Adding one's application to the
registry also works. The IE Tools - Internet Options - Advanced - Security
does not work, even after a reboot. And so far, I can not get the "Insert a
Mark of the Web" to work for CDHtmlDialog, and it appears to be the best

In conclusion, this whole concept of the "Local Machine Zone Lockdown"
should at the minimum, come with a GUI applciation to let administrators turn
it on or off, and remotely as well as locally, configure one's machine to
grant access to specific applications. And the error codes from IE should
properly reflect that SCRIPT Tags trying to use the RES Protocol are locked
down, and let one have the ability to override them.

Also, we need a working sample for the CDHtmlDialog class that uses 100%
successfully, the "Insert Mark of the Web" to let SCRIPT Tags use the RES
Protocol, as that I still can not get to work.