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Topic: PDF plugin detection -- solved
Conf: (P-PDF) Developers, Msg: 36788
From: spinstir
Date: 3/16/2002 08:17 AM

After finding pretty much 0 answers to this question
(which I had expected to be pretty simple), I was
fortunate enough to find what I was looking for.

For IE on Windows to detect a plugin, it needs a
piece of VBscript to create an ActiveX control, then
test whether that control exists.

If you search the macromedia site for plugin
detection, you'll find a pretty definitive plugin
detection script (for the shockwave or the flash
player). You can modify either of those scripts to
detect the Reader plugin by replacing the plugin
name and the mimetype and the ActiveX control

For example, in the Shockwave player plugin
detection script, the plugin name is "Shockwave for
Director", the mimetype is "application/x-director"
and the classID in the VBscript area is
"SWCtl.SwCtl". (it might actually be
"SWCtl.SWCtl.8", or something like that - the .8 just
refers to the version of the shockwave player.)

Replace each instance of "Shockwave for Director"
with "PDFViewer", each instance of
"application/x-director" with "application/x-pdf", and
each instance of "SWCtl.SWCtl.8" (or whatever is
there) with "PDF.PdfCtrl.5".

And that's it.

Incidentally, I finally found the Reader ClassID by
downloading a Windows application called
OLE/COM Object Viewer from the MS developer
site. It is a standalone version of a component of
Visual InterDev. It's free and it gives all kinds of
information on plugins and what-all other things
fall into the OLE/COM category.

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