I used a similar algorithm (see my reply to Steve in another thread). However, machine can not have Adobe Acrobat at all, so your method is not complete. I looked through the registry yesterday and since Distiller was at the top, I just decided to use it.

Thanks anyway. My code worked in several tests, we conducted on few machines and my manager is going to migrate it to Live today.

>Nadya,
>
>I've PDFWriter 5.0 installed on my PC and there is PDFWriter item with value 1 under HKEY_LOCAL_MACHINE\SOFTWARE\Adobe\Acrobat\5.0\Uninstall registry key. I think you can check for it to determine if PDFWriter 5.0 is installed. Using Rick's registry class

>#DEFINE HKEY_LOCAL_MACHINE  2147483646
>oReg = NEWOBJECT("Registry", "Registry.prg")
>lcRegKey = "SOFTWARE\Adobe\Acrobat\5.0\Uninstall"
>lnValue = oReg.ReadRegistryInt(HKEY_LOCAL_MACHINE,lcRegKey, "PDFWriter")
>IF NOT ISNULL(lnValue) AND lnValue = 1
>   * PDFWriter 5.0 is installed
>ELSE
>   * Assume that PDFWriter 4.0 is installed
>ENDIF
>

>
>>Hi everybody,
>>
>>Most computers in our office have Adobe Acrobat Writer 4 installed. My manager's computer has Adobe 5. I was trying to use wwPDF class from west-wind.com wwPDF50 doesn't work on my machine (with Adobe 4 installed) and wwPDF40 refers to IsWinNT function, which is not included into the wwPDF archive. In any case, I need to know, which Adobe version is installed to use the correct class.
>>
>>What can you suggest in this situation? Any other simple solutions, which would not require a 3rd party product?
>>
>>Thanks a lot in advance.