How do I read 64-bit Registry values from VBScript running as a an msi post-installation task?
- by Joergen Bech
I need to read the location of the Temporary ASP.NET Files folder from VBScript as part of a post-installation task in an installer created using a Visual Studio 2008 deployment project.
I thought I would do something like this:
Set oShell = CreateObject("Wscript.Shell")
strPath = oShell.RegRead("HKLM\SOFTWARE\Microsoft\ASP.NET\2.0.50727.0\Path")
and then concatenate strPath with "\Temporary ASP.NET Files" and be done with it.
On an x64 system, however, I am getting the value from the WOW6432Node (HKLM\SOFTWARE\Wow6432Node\Microsoft\ASP.NET\2.0.50727.0), which gives me the 32-bit framework path (C:\Windows\Microsoft.NET\Framework\v2.0.50727), but on an x64 system, I actually want the 64-bit path, i.e. C:\Windows\Microsoft.NET\Framework64\v2.0.50727.
I understand that this happens because the .vbs file is run using the 32-bit script host due to the parent process (the installer) being 32-bit itself.
How can I run the script using the 64-bit script host - or - how can I read the 64-bit values even if the script is run using the 32-bit script host?
