Writting settings to the registry, shared by x64 and x86 apps (bypassing registry redirection)

Question

I want to write application settings in the registry, that are shared by x86 and x64 applications running on Windows 7 x64.

The best practice is to save them in HKEY_LOCAL_MACHINE\Software\Company\Product, but that gets redirected when in WOW64.

Can I write them in HKEY_LOCAL_MACHINE\System.. instead? Or System is reserved for other thigns?

treaschf · Accepted Answer · 2009-12-11T06:23:16.637

2

When in x64 mode, you can still access the values of the WOW64 mode. The WOW64 HKEY_LOCAL_MACHINE\Software\Company\Product will be under HKEY_LOCAL_MACHINE\Software\Wow6432Node\Company\Product.

Edit:

Reflection can also be disabled for certain keys, as it is described here: http://msdn.microsoft.com/en-us/library/ms724072(VS.85).aspx

edited Dec 11 '09 at 06:23

answered Dec 10 '09 at 17:32

treaschf

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But I don't want to hardcode Wow6432 in my program (I've read that's not recommended). It'd be better to disable redirection for my key.. can I do that? – Nestor Dec 10 '09 at 17:37
I think what can be disabled is reflection, but not redirection... am I right? – Nestor Dec 10 '09 at 18:46
Using XML files can be a better approach. – Lex Li Dec 11 '09 at 06:34

score 0 · Answer 2 · answered Jun 17 '10 at 13:04

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You can use the SetRegView option as described in the manual: http://nsis.sourceforge.net/Docs/Chapter4.html#4.9.7.6

Function .onInit SetRegView 64 ReadRegStr $INSTDIR HKLM Software\NSIS "" SetRegView 32 FunctionEnd

answered Jun 17 '10 at 13:04

Rogier

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Thanks, but do you have an example that isn't specific to NSIS? – tresf May 13 '19 at 21:31

Writting settings to the registry, shared by x64 and x86 apps (bypassing registry redirection)

2 Answers2