Per-User COM Registrations and Elevated Processes with UAC on Windows Vista SP1 Part 2: OLE Automation

re: Per-User COM Registrations and Elevated Processes with UAC on Windows Vista SP1 Part 2: OLE Automation

Chris Jackson - MSFT — Mon, 04 Aug 2008 19:11:52 GMT

Probably - procmon should show it trying to pull from the wrong place and the stack would contain oleaut32.

re: Per-User COM Registrations and Elevated Processes with UAC on Windows Vista SP1 Part 2: OLE Automation

Erik Cassel — Sat, 02 Aug 2008 21:14:04 GMT

Ah ha! Perhaps this explains the following odd behavior in javascript:

var foo = new ActiveXObject("My.PerUserObject");

foo.HelloWorld();

The creation of "foo" succeeds, but calling "HelloWorld" fails with an inability to load the type library.

ProcMon reveals that iexplorer.exe is running elevated. The process is able to load the CLSID from HKCR but then fails to load the TypeLib from HKCR. The configuration is per-user COM, Vista SP1, UAC disabled. It works fine with UAC enabled.

Is this the OLE Automation bug in action?

re: Per-User COM Registrations and Elevated Processes with UAC on Windows Vista SP1 Part 2: OLE Automation

Greg Lambert — Tue, 29 Jul 2008 12:10:39 GMT

As always, the level of detail on these types of issues is amazing... another really helpful post from CJ...