Error reading registry in 64 bit deployment

[Bobby C. Jones at dot com]

I have code in an installer class that runs as a custom action and searches
the registry. On 32 bit systems, it runs fine. On 64 bit systems, it runs
fine in the test units, but fails when run in the installer. It fails at:

RegistryKey key =
Regitstry.LocalMachine.OpenSubKey(@"Software\Autodesk\Revit\Autodesk Revit
Architecture 2010")

It returns null. I'm sure this is due to a fundamental misunderstanding on
my part. Could someone set me straight. Thanks.

private string GetSubKeyValue(string regPathKey, string subkeyName,
string valueName)
{
try
{
using (RegistryKey key =
Registry.LocalMachine.OpenSubKey(regPathKey)) //key is null
using (RegistryKey subKey = key.OpenSubKey(subkeyName))
{
string val = subKey.GetValue(valueName) as string;
if (val == null) { return string.Empty;}
else { return val; }
}
}
catch
{
return string.Empty;
}
}

--
Bobby C. Jones
http://bobbycjones.spaces.live.com

[Bobby C. Jones at dot com]

[Bobby C. Jones at dot com]

Problem solved via this blog entry by Heath Stewart.

http://blogs.msdn.com/heaths/archive/2006/02/01/64-bit-managed-custom-actions-with-visual-studio.aspx