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  • Chris Jackson is a Principal Consultant at Microsoft and the Technical Lead for the Windows Application Experience SWAT Team. But most people just call him The App Compat Guy.

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Using the uiAccess attribute of requestedExecutionLevel to Improve Applications Providing Remote Control of the Desktop
I’ve run into this exact same problem 3 times now in one week, so I figure that probably doesn’t bode well and I should attempt to do something about it. With 3 different pieces of software (one of them ours), the remote control functionality is imperfectly Read More...
Why Do Some Operating System Modes Include AdditiveRunAsHighest While Others Do Not?
A little while back, those of us who explain application compatibility for a living and try to help people get their arms around it ran up against those who implement it in the product on the scale of … the whole earth. Those of us who explain things Read More...
Changes to the Operating System Layers (Compatibility Modes) in Windows 7
It’s visible in the beta, but I haven’t heard a lot of people talking about this externally. Regardless, I wanted to shed some light on what happened, and add a bit of the human perspective behind the decision. If you inspect the operating system layers Read More...
Standard User Analyzer Refuses to Run with Application Verifier 4.0 (and Application Verifier 3.x is Gone!)
Updated March 16, 2009: Somebody updated these links with the 4.0 version (which kind of defeats the purpose of having these links so I’m not sure what they were thinking) but they’re back to the 3.x version now. Hey, there’s a new version of Application Read More...
Why don’t elevated applications receive environment variables set by non-elevated calling process?
I had a conversation with a customer (via email) the other day, and I wanted to to into a bit of detail here explaining what is going on. Essentially, the customer was attempting to pass information to another application while launching it using environment Read More...
Per-User COM Registrations and Elevated Processes with UAC on Windows Vista SP1 Part 2: OLE Automation
Here's an interesting lesson which, quite honestly, I haven't thought about for a while. But it turns out it's rather important. A little over a month ago, I talked about a change to Windows Vista in SP1 regarding per-user COM registration , indicating Read More...
Per-User COM Registrations and Elevated Processes with UAC on Windows Vista SP1
A while back, I was talking about per-user COM registration and elevated processes on Windows Vista . True at the time was this fact: It also means you won't pick up a per-user COM object if you are running as a member of the local Administrators group Read More...
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