How Do I Detect DAO Installed?
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Hi everyone. I need to detect whether or not DAO 3.5 or higher is installed on a system, specifically the Jet engine. Both my installer and the program itself will detect this. I looked over at codeguru and found an article which says to check to see if the key "HKEY_LOCAL_MACHINE\Software\Microsoft\Jet\3.5\Engines". I assume, logically, I would check to see if the Jet 3.5 subkey exists to check if the Jet 3.5 engine is installed. My question is, is this the best way to do this, and is it the way Microsoft recommends? I searched MSDN for hours and couldn't find an article on the proper way to detect a DAO installation. And, will this work if the user has a higher version than 3.5 installed? Thanks!
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Hi everyone. I need to detect whether or not DAO 3.5 or higher is installed on a system, specifically the Jet engine. Both my installer and the program itself will detect this. I looked over at codeguru and found an article which says to check to see if the key "HKEY_LOCAL_MACHINE\Software\Microsoft\Jet\3.5\Engines". I assume, logically, I would check to see if the Jet 3.5 subkey exists to check if the Jet 3.5 engine is installed. My question is, is this the best way to do this, and is it the way Microsoft recommends? I searched MSDN for hours and couldn't find an article on the proper way to detect a DAO installation. And, will this work if the user has a higher version than 3.5 installed? Thanks!
I have no idea what is the recommended way by Microsoft but I would enumerate all registry keys under HKEY_LOCAL_MACHINE\Software\Microsoft\Jet\ and parse the returned strings to version numbers... -Dominik
_outp(0x64, 0xAD);and__asm mov al, 0xAD __asm out 0x64, aldo the same... but what do they do?? ;) -
Hi everyone. I need to detect whether or not DAO 3.5 or higher is installed on a system, specifically the Jet engine. Both my installer and the program itself will detect this. I looked over at codeguru and found an article which says to check to see if the key "HKEY_LOCAL_MACHINE\Software\Microsoft\Jet\3.5\Engines". I assume, logically, I would check to see if the Jet 3.5 subkey exists to check if the Jet 3.5 engine is installed. My question is, is this the best way to do this, and is it the way Microsoft recommends? I searched MSDN for hours and couldn't find an article on the proper way to detect a DAO installation. And, will this work if the user has a higher version than 3.5 installed? Thanks!
We use a try-catch around AfxDaoInit() function to test if DAO is working correctly and abort/warn if it is not. It throws a CDaoException if something isn't right. Joel Lucsy