MSDN: Touch in Windows 8 - for multi-touch device vendors

http://msdn.microsoft.com/en-us/library/windows/hardware/hh852381.aspx

Windows Pointer Device Data Delivery Protocol

How to Design and Test Multitouch Hardware Solutions for Windows 8

Overview of Measuring Touch Down Hardware Latency

Overview of Measuring Touch Panning Hardware Latency

How to Measure Touch Panning Latency

How to Measure Touch Down Latency

How to Use the Windows Touch Quality Certification Tests

Windows 8 Touch HCK Device Submission template

Windows Touch Test Lab for Windows 8

How to Use the Precision Touch Testing Tool

Power Handling for Windows 8 Touch Controllers

Developer Enhancements to Windows Touch and Tablet PC

How to Design and Test Multitouch Hardware Solutions

Introduction to Windows Touch

Windows 7 Engineering Guidance for Slate PCs

Windows 7 Touch Overview and PC Design Considerations (video)