Thanks to Duncan and Gabor.
Following from Duncan
On my machine,
HKEY_CLASSES_ROOT\AcroExch.Document\shell\open\command
HKEY_CLASSES_ROOT\AcroExch.Document.7\shell\open\command
are both set to
"C:\Program Files\Adobe\Acrobat 6.0\Acrobat\Acrobat.exe" "%1"
HKEY_CLASSES_ROOT\acrobat\shell\open\command
is set to (without quotes on the file name)
C:\Program Files\Adobe\Acrobat 8.0\Reader\AcroRd32.exe /u "%1"
HKEY_CLASSES_ROOT\.pdf\OpenWithList\AcroRd32.exe\
has
ab (Default) REG_SZ
as its sole entry
There is whole collection of items under
HKEY_CURRENT_USER\Software\Adobe\
and under
HKEY_LOCAL_MACHINE\SOFTWARE\Adobe\
Following from Gabor
The machine had acrotray.exe in its
c:/Documents and Settings/All Users/Start Menu/Programs/Startup/Acrobat
Assistant.lnk
which links to C:\Program Files\Adobe\Acrobat 6.0\Distillr\acrotray.exe
This program appears in "Windows Task Manager/Processes".
It did not appear on the system tray.
I moved it to
c:/Documents and Settings/All Users/Start Menu/Programs/Startup.removed/Acrobat
Assistant.lnk
and rebooted.
acrotray.exe is no longer in "Windows Task Manager/Processes".
shell.exec(".../.pdf") still starts Acrobat 6
At this point I am done with this investigation.
Rich
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