Re: Determining whether Oracle8 Client is installed

This is probably true most of the time, but as Billy Verreynne pointed out there is no way to determine if it is installed correctly..Oracle's uninstaller may miss some things especially if used badly, and even if you checked for a tnsnames.ora file in the ORACLE_HOME/Network/admin ( or maybe Net80/admin) location, it could be a leftover..Or they could have multiple homes, or other problems..

Just a nitpick as well, there are 2 distinct 'flavors' of Oracle 8 - the 8.0.x series and the 8.1.x ( often called 8i ) - they are not fully interchangeable, so your program would have to also check for 'which' Oracle8 is installed, if any..

The only real way is to hope that your users can read the requirements...

"Vladimir M. Zakharychev" <bob_at_dpsp-yes.com> wrote:

>HKLM\SOFTWARE\ORACLE\ORACLE_HOME key will point you to current
>Oracle home. Under this directory, inspect bin\ociw32.dll and possibly one
>of oraclient8.dll, ora80.dll, ora802.dll, ora803.dll, ora804.dll, ora805.dll
>or ora806.dll (oraclient8.dll is common for all 8i releases while the rest is
>for specific Oracle8 version). You can also check for oracore8.dll since this
>DLL is also referenced from ociw32.dll. All DLLs contain VS_VERSION_INFO
>resource, so I think you can use InstallShield version check with them.
>If the key or any of the dlls are missing (note that any one of oraclient8.dll
>or oraXXX.dll is needed, not all of them) you can assume that Oracle client
>software is not installed.
>
>hth.

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