Consider the following scenario:

  • You create an HTML webpage in Microsoft Visual Studio 2010 that uses the eval function. The eval function’s argument contains JavaScript code.

  • You open the webpage in Windows Internet Explorer 7 (IE7), in Internet Explorer 8 (IE8), or in Internet Explorer 9 (IE9).

  • In Visual Studio 2010, you attach to the Iexplore.exe process in order to debug the JavaScript code.

In this scenario, the JavaScript code that is contained in the eval function’s argument is not displayed in Solution Explorer. Additionally, a Find Source: eval code dialog box appears in Visual Studio 2010.


  • If you attach to the Iexplore.exeprocess before the webpage is loaded by Internet Explorer, the JavaScript code that is contained in the eval function’s argument is displayed in Solution Explorer. However, you may have to reopen the eval code file to continue debugging if one of the following conditions is true:

    • New JavaScript code is added.

    • The wrong line is highlighted if a breakpoint is set in the JavaScript code.

  • This issue does not occur in Visual Studio 2005 or in Visual Studio 2008.


Hotfix information

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 software update 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: 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.


To apply this hotfix, you must have Visual Studio 2010 Service Pack 1 (SP1) installed.

Restart requirement

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

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it 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 name

File version

File size











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


For more information about the eval function, visit the following MSDN website:

General information about the eval function

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