How can I manipulate properties in a running .NET application?

Windows Live Writer's editing surface wraps the IE Browser Control. The WindowsLive.Writer.BrowserControl class has a TextSize property which probably sets the zoom for the editing surface, but there's no UI to set the property. I've messed with stuff like this before using Snoop (WPF), Spy++ (general Windows), etc., but it's been a while. If I wanted to write a console application which found the Windows Live Writer instance and changed the BrowserControl's TextSi开发者_如何学Goze property, how would I do it?

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You could maybe use the Microsoft UI-Automation to manipulate any type of control in any Windows-Application (MFC, WinForms and WPF). Have a look here http://msdn.microsoft.com/en-us/magazine/cc163288.aspx

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Take a look at Hawkeye. It can inspect and edit any object from a .Net application, including changing properties of controls within the application.

If just using the tool is not good enough, you could look at how it achieves the behaviour in its source code (its on CodePlex) and use a similar mechanism.