Applications that use Windows Automation APIs can significantly decrease Microsoft Visual Studio IntelliSense performance if Windows Automation API 3.0 is not installed. For example, the Windows pen and touch services can significantly decrease Visual Studio IntelliSense performance if Windows Automation API 3.0 is not installed. This article describes how to install the Windows Automation API 3.0 update. This update is available as a stand-alone download for 32-bit editions of Windows XP and for Windows Server 2003. This update is not available for 64-bit editions of Windows XP. The Windows Automation API is a component of the platform update for Windows Vista and of the platform update for Windows Server 2008.
Windows Automation API
The Windows Automation API library enables accessibility tools, test automations, and pen services to access a standard user interface across operating system versions.
For more information about the Windows Automation API, visit the following Microsoft Developer Network (MSDN) Web site:
Notes The integrated installation of this package may function incorrectly when you use the procedures that are described in the following Microsoft Knowledge Base article:
828930 How to integrate software updates into your Windows installation source files
This is a known issue. If Microsoft releases a software update to resolve this problem, this article will be updated with additional information.
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
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VS 2010 Windows Automation API 3.0 application programming interface MSAA UIA UI Automation Platform Update for Windows Vista Platform Update for Windows Server 2008 Platform Update for Windows XP