32/64 bit locations

Targets Windows
1

While I have known for some time that Windows stores registry keys in different locations based on the application being 32 or 64 bits today I also discovered that for Services the SpecialFolder.ApplicationData folder is also different.

A 64bit Service will see the application data at C:\\Windows\\System32\\config\\systemprofile\\AppData\\Roaming\\
while a 32bit Service will see the data at C:\\Windows\\SysWOW64\\config\\systemprofile\\AppData\\Roaming\\.

The native path of both however will appear to be C:\\Windows\\System32\\config\\systemprofile\\AppData\\Roaming\\ when using the folder item native path.

In the registry you’ll find an added WOW6432Node layer.

32bit ODBC is Computer\\HKEY_LOCAL_MACHINE\\SOFTWARE\\WOW6432Node\\ODBC
while 64bit is Computer\\HKEY_LOCAL_MACHINE\\SOFTWARE\\ODBC

Windows automagically maps these settings for 32 bit apps on 64bit OS’s.

2

If you use the MBS Registry classes, you can use Use64bitRegistry parameter on the RegistryKeyMBS.CreateKey, RegistryMBS.Key and RegistryMBS.getStringValue methods to decide if your 32-bit app wants to edit 32 or 64bit registry.
see
http://www.monkeybreadsoftware.net/class-registrymbs.shtml

3

Thank you @Christian Schmitz my conversation starter was informational rather than advertorial, but I have no problems with you promoting your add-ons here.

4

Great. See you at the next conference!

5

I’d love to attend, you paying?

6

Well, this week in Berlin I pay a lot.

You never know what things cost beforehand.