Sun plugin and Microsoft VM

Question

Hi,
I have a user base that has installed the Sun plugin (and it is enabled by default), but I would like to make some of the applets on my web site to run using Microsoft VM for Java (note: not "Java VM" :) on their machines even when the Sun plugin is installed and enabled. (Telling them to reconfigure plugin settings on the fly using Tools->Internet Options->Advanced->.... when they enter the spesific applets is far too cumbersome in this case.) My users run other applets that depend on a pure Java VM, so they must have the plugin installed at all times.
It seems that the Sun plugin takes control over the APPLET tag, so I believe it cannot be used and the OBJECT tag should be used instead.
On Win2K, running particular applets in the MS VM can be accomplished by using the OBJECT tag and java: as a prefix to the class name. Example:
<OBJECT ID="Test"
CODETYPE="application/java"
CLASSID="java:Test.class"
WIDTH="400" HEIGHT="140">
</OBJECT>
However, my user base has WinNT4.0 so this won't work on their machines.
I have tried to specify that the applet should be run in the MS VM using an OBJECT tag and a classid that directly refers to the Web Browser Applet Control (clsid:08B0E5C0-4FCB-11CF-AAA5-00401C608501), however, this does not work the way I want it to (the Sun plugin starts instead). And by using OLEVIEW I can see why: There is a TreatAs key for the InprocServer (msjava.dll) there, referring to an object with classid CAFEEFAC-0014-0000-0000-ABCDEFFEDCBB. This turns out to be a "Java Plug-in 1.4.0<applet> redirector".
Also, I have found out that the registry key HKEY_LOCAL_MACHINE\\SOFTWARE\\JavaSoft\\Java Plug-in\\1.4.0\\UseJava2IExplorer changes its value from 0 to 1 when a user enables the plugin via Tools->Internet Options->Advanced->.... and from 1 to 0 when a user disables it.
My hunch is that the applet redirector, i.e. its Inproc Server npjpi140.dll, either runs the applet or redirects to the MS VM depending whether the registry key UseJava2IExplorer equals 1 or 0.
What I would like to know is the classid of the MS VM component that eventually receives the request to run an applet when the Sun plugin is disabled. My idea is that this is in some way stored inside the npjpi140.dll, however, I would like to avoid having to reverse engineer this file if Sun (or some others) can provide the information.
I have tried all available classid targets from the Registry that have msjava.dll as InprocServers, without success.
Also, if the redirection mechanism is not like what I have described here, I would be very grateful for more information and of course, what I essentially need is a way to solve the problem whether this involves using OBJECT tag and classid's or not.
Thanks!
Kristoffer
Kristoffer Dyrkorn - [email protected]
Java Developer

Answer 1

Kristoffer,
If you have not already found the clisd, it is {08B0E5C0-4FCB-11CF-AAA5-00401C608500} for MS VM version 3805.
I am currently having application conflicts with the newest JRE client and apps that need to use the MS VM. Have you had any luck utilizing both as of yet?
Regards,
Scott Hannigan
s c o t t . h a n n i g a n @ b a n k o f a m e r i c a . c o m