How to determine if Adobe Acrobat is installed?

You can look into the Windows Registry for the Adobe Acrobat key:
  HKEY_LOCAL_MACHINE\SOFTWARE\Adobe\Acrobat Reader

Bob

Query registry for:
HKLM\Microsoft\Windows\CurrentVersion\App Paths\Acrobat.exe

Also, there's:
HCLM\Microsoft\Windows\CurrentVersion\App Paths\AcroRed32.exe

The actual install paths are in Path value underneath there.

Sorry Bob, I was typing while you were.

Never a problem with me ;)

Bob

Thank you TheLearnedOne for your suggestion.  After a little looking around on the computers in our office, I found that the suggested key is not a completely reliable indicator, because computers that have Adobe Acrobat Professional installed, but not Adobe Reader, did have that key.  In addition, the subkeys (if any) vary per version.  This was the key you suggested:

    HKEY_LOCAL_MACHINE\SOFTWARE\Adobe\Acrobat Reader

The key suggested by ddrudik does seem to be more reliable, because computers that have Adobe Acrobat Professional installed, but not Adobe Reader, did not have the AcroRd32.exe key; computers that did have Adobe Reader installed, also had the AcroRd32.exe key.  In addition, the AcroRd32.exe key is the same key for both Adobe Readers 6.0-8.0...  (seemingly not version specific - other than 32 bit, which is what my program is anyway.).  ddrudik's recommendation:

    HKLM\Microsoft\Windows\CurrentVersion\App Paths\AcroRd32.exe

So thank you both again, very much!

Thanks for the question and the points.

Thanks for your help!