wow64 Questions

6

Solved

I have a c# unit test project that is compiled for AnyCPU. Our build server is a 64bit machine, and has a 64bit SQL Express instance installed. The test project uses code similar to the following t...
Glutathione asked 10/6, 2009 at 6:48

5

Solved

I would like to know when do we need to place a file under C:\Windows\System32 or C:\Windows\SysWOW64, on a 64-bits windows system. I had two DLL's, one for 32-bit, one for 64-bit. Logically, I tho...
Chinkapin asked 4/6, 2009 at 11:30

7

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On Windows, under normal circumstances a 32 bit process can only access 2GB of RAM (or 3GB with a special switch in the boot.ini file). When running a 32 bit process on a 64 bit operating system, h...
Bullough asked 12/3, 2009 at 17:0

3

Solved

I have a requirement to retrieve all modules of a 64bit process in a 32bit WOW process in Windows, EnumProcessModules would fail as described: If this function is called from a 32-bit applicatio...
Selfappointed asked 27/9, 2010 at 6:24

5

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I was making the following call: result = RegOpenKeyEx(key, s, 0, KEY_READ, &key); (C++, Visual Studio 5, Vista 64bit). It is failing with error code 2 ("File not found") even though "reged...
Crellen asked 31/10, 2008 at 0:58

4

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I'm trying to insert some simple registry keys using Microsoft.Win32.RegistryKey in c# but the path automatically changes from: HKEY_LOCAL_MACHINE\SOFTWARE\Test to HKEY_LOCAL_MACHINE\SOFTWARE\W...
Instrumentation asked 4/8, 2012 at 11:56

4

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I have some code that reads the registry and looks for a value in HKEY_LOCAL_MACHINE\Software\App\ but when running on 64-bit versions of Windows the value is under HKEY_LOCAL_MACHINE\Software\Wow6...
Wily asked 11/1, 2010 at 0:0

2

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I'm trying to run the Windows System Assessment Tool (winsat.exe) using the following code: System.Diagnostics.Process WinSPro = new System.Diagnostics.Process(); System.Diagnostics.ProcessStartI...
Jeu asked 30/5, 2013 at 2:56

2

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I am getting a mysterious error from time to time that I just don't get. I can "fix" it by restarting Visual Studio 2008, but that isn't exactly a solution... It states the following: Er...
Dialyze asked 13/1, 2010 at 17:57

3

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I have a Visual Studio installer that is creating some registry keys: HKEY_LOCAL_MACHINE\SOFTWARE\MyApp but the registry keys it is creating are automatically appearing under Wow6432Node: HKEY_...
Eremite asked 4/2, 2010 at 3:12

1

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I was trying to build gdal-1.10.0 (http://trac.osgeo.org/gdal/wiki/DownloadSource) using mingw64 (from http://sourceforge.net/projects/mingwbuilds/files/host-windows/ x64-4.8.0-release-posix-seh-re...
Albumose asked 15/5, 2013 at 7:6

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MSDN tells me that handles to windows (HWND) can be shared between 32- and 64-bit applications, in Interprocess Communication (MSDN). However, in Win32 a HWND is 32 bits, whereas in 64 bit Windows ...
Mahlstick asked 30/11, 2009 at 21:56

1

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I'm trying to add a key to LocalMachine in registry. I'm using this code: System.Diagnostics.Debugger.Launch(); RegistryKey key = Registry.LocalMachine.OpenSubKey("SOFTWARE", true); RegistryKey...
Enochenol asked 19/2, 2013 at 11:38

1

To start with, this is not a general question about how to do heap analysis, as this I'm quite familiar with in earlier versions of Windows. What I'm wondering however is if anyone has managed to ...
Swats asked 29/1, 2013 at 9:19

4

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I want to add support for x64 OSes to my NSIS installer. One of the installer's task is drivers installation. I've written a special NSIS plugin for this task. This plugin uses Driver Install Frame...
Anneal asked 17/3, 2010 at 18:27

1

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I have a small 32bit process I'm debugging on win7 x64 and I see that it loads "C:\windows\sysWow64\ntdll.dll" as expected, but also "C:\windows\system32\ntdll.dll" . I know that x64 modules and x8...
Scriabin asked 17/4, 2012 at 15:39

2

I'm trying to troubleshoot slow startup of a third-party binary (no source). It is a 32-bit application running on 64-bit Windows 7. I've used a debugger to break into the application while it's h...
Sorbian asked 22/3, 2012 at 21:49

1

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I have written a simple Java class to generate the hash values of the Windows Calculator file. I am using Windows 7 Professional with SP1. I have tried Java 6.0.29 and Java 7.0.03. Can someone tell...
Bertilla asked 15/3, 2012 at 20:57

3

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All WoW64 apps go through WoW64 emulation layer. I'd like to know what happen in this layer.(especially, how they can convert address space) Please give me some important points.
Southdown asked 16/3, 2011 at 13:9

1

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I originally designed a win32 application on win7 32bits, with VC9.0. I recently upgraded to win7 64 bits, and tried to build+execute the previous application. Building runs fine (win32 applicatio...
Satinwood asked 21/3, 2011 at 0:10

2

I've got a python program which is supposed to clean up a number of directories and one of them is C:\windows\system32\inetsrv\metaback; however, os.path.exists() returns False on that directory ev...
Asinine asked 6/2, 2011 at 4:20

3

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I need to know whether a given .exe is 32-bit or a 64-bit, before I launch it. IsWow64Process is no use here, since there is no process yet. Is there some other API that will give me this informati...
Goldcrest asked 3/11, 2010 at 17:11

4

Solved

My .NET application (any-CPU) needs to read a registry value created by a 32-bit program. On 64-bit Windows this goes under the Wow6432Node key in the registry. I have read that you shouldn't hard-...
Dish asked 2/7, 2009 at 13:42

6

I have a C# app that must link with a 32-bit library and also needs to use the maximum amount of memory possible (imaging app); we run the app on XP64 desktops, thus we are using WOW64, targeting b...
Erlineerlinna asked 29/4, 2009 at 19:36
1

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