FIX: Multitouch devices become unresponsive when you use a .NET Framework 4.0-based WPF application that uses a Wacom driver


When you use a Microsoft .NET Framework 4.0-based Windows Presentation Foundation (WPF) application that uses a Wacom driver on a multitouch device, the multitouch function does not work. Additionally, the application becomes unresponsive to any touch events.


This problem occurs because the Wacom driver does not support the device ID string descriptor. When the WPF control tries to send a device ID string descriptor, the driver returns a "Not Supported" message. When the WPF control receives the "Not Supported" message, the control stops responding to any request that contains a device ID string descriptor.

Note According to USB specifications, the device ID string descriptor is optional.


A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft website:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Note You can download this hotfix rollup from the following Microsoft Connect Web site:


There are no prerequisites for installing this hotfix package.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix package does not replace a previously released hotfix package.

File Information

The English (United States) version of this hotfix package uses a Microsoft Windows Installer package to install the hotfix package. The dates and the times for these files are listed in Coordinated Universal Time (UTC) in the following table. When you view the file information, the date is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
File nameFile versionFile sizeDateTimePlatform


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

ID do Artigo: 2328751 - Última Revisão: 29/10/2010 - Revisão: 1