An assistive technology product does not detect Windows events in Windows 7

Symptoms

Assume that you run multiple assistive technology products at the same time on a computer that is running Windows 7. In this situation, an assistive technology product does not detect Windows events.

For example, consider the following scenario:

  1. You start Microsoft Magnifier.

  2. You click to select the Follow the keyboard focus check box in the Magnifier Options dialog box.

  3. You start Microsoft Narrator.

In this scenario, Magnifier does not follow the keyboard focus.

Cause

This issue occurs because Microsoft Active Accessibility prevents User Interface (UI) Automation from handling the WM_GETOBJECT message that is associated with Windows events. Instead, Active Accessibility tries to handle the WM_GETOBJECT message itself. However, Active Accessibility does not trigger Windows events. Therefore, Active Accessibility cannot handle the WM_GETOBJECT message and this issue occurs.

Resolution

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might 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.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must be running Windows 7 or Windows 7 Service Pack 1 (SP1).For more information about how to obtain a Windows 7 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

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 global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 7 file information notes
  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    SR_Level

    Service branch

    6.1.760
    0.
    16xxx

    Windows 7

    RTM

    GDR

    6.1.760
    0.
    21xxx

    Windows 7

    RTM

    LDR

    6.1.760
    1.
    17xxx

    Windows 7

    SP1

    GDR

    6.1.760
    1.
    21xxx

    Windows 7

    SP1

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • The MANIFEST files (.manifest) that are installed for each environment are listed separately in the "Additional file information for Windows 7" section. MANIFEST files and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Actxprxy.dll

6.1.7600.21016

309,760

27-Jul-2011

04:25

x86

Dui70.dll

6.1.7600.16856

717,824

27-Jul-2011

04:29

x86

Dui70.dll

6.1.7600.21016

717,824

27-Jul-2011

04:26

x86

Dui70.dll

6.1.7601.17658

717,824

27-Jul-2011

04:25

x86

Dui70.dll

6.1.7601.21779

717,824

27-Jul-2011

05:45

x86

Explorerframe.dll

6.1.7600.16856

1,500,160

27-Jul-2011

04:30

x86

Explorerframe.dll

6.1.7600.21016

1,501,184

27-Jul-2011

04:26

x86

Explorerframe.dll

6.1.7601.17658

1,498,624

27-Jul-2011

04:26

x86

Explorerframe.dll

6.1.7601.21779

1,498,624

27-Jul-2011

05:46

x86

Uiautomationcore.dll

7.0.0.0

562,176

27-Jul-2011

04:31

x86

Uiautomationcore.ptxml

Not Applicable

1,054

13-Jul-2009

20:31

Not Applicable

Uiautomationcore.dll

7.0.0.0

562,176

27-Jul-2011

04:28

x86

Uiautomationcore.ptxml

Not Applicable

1,054

13-Jul-2009

20:31

Not Applicable

Uiautomationcore.dll

7.0.0.0

561,664

27-Jul-2011

04:29

x86

Uiautomationcore.ptxml

Not Applicable

1,054

13-Jul-2009

20:31

Not Applicable

Uiautomationcore.dll

7.0.0.0

561,664

27-Jul-2011

05:51

x86

Uiautomationcore.ptxml

Not Applicable

1,054

13-Jul-2009

20:31

Not Applicable

For all supported x64-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Actxprxy.dll

6.1.7600.21016

957,952

27-Jul-2011

05:32

x64

Dui70.dll

6.1.7600.16856

977,408

27-Jul-2011

05:28

x64

Dui70.dll

6.1.7600.21016

977,408

27-Jul-2011

05:33

x64

Dui70.dll

6.1.7601.17658

977,920

27-Jul-2011

05:31

x64

Dui70.dll

6.1.7601.21779

977,920

27-Jul-2011

05:19

x64

Explorerframe.dll

6.1.7600.16856

1,865,216

27-Jul-2011

05:29

x64

Explorerframe.dll

6.1.7600.21016

1,866,240

27-Jul-2011

05:34

x64

Explorerframe.dll

6.1.7601.17658

1,867,264

27-Jul-2011

05:32

x64

Explorerframe.dll

6.1.7601.21779

1,867,264

27-Jul-2011

05:20

x64

Uiautomationcore.dll

7.0.0.0

751,104

27-Jul-2011

05:35

x64

Uiautomationcore.ptxml

Not Applicable

1,054

13-Jul-2009

20:25

Not Applicable

Uiautomationcore.dll

7.0.0.0

751,104

27-Jul-2011

05:40

x64

Uiautomationcore.ptxml

Not Applicable

1,054

13-Jul-2009

20:25

Not Applicable

Uiautomationcore.dll

7.0.0.0

752,640

27-Jul-2011

05:38

x64

Uiautomationcore.ptxml

Not Applicable

1,054

13-Jul-2009

20:25

Not Applicable

Uiautomationcore.dll

7.0.0.0

752,640

27-Jul-2011

05:21

x64

Uiautomationcore.ptxml

Not Applicable

1,054

13-Jul-2009

20:25

Not Applicable

Explorerframe.dll

6.1.7600.16856

1,500,160

27-Jul-2011

04:30

x86

Explorerframe.dll

6.1.7600.21016

1,501,184

27-Jul-2011

04:26

x86

Explorerframe.dll

6.1.7601.17658

1,498,624

27-Jul-2011

04:26

x86

Explorerframe.dll

6.1.7601.21779

1,498,624

27-Jul-2011

05:46

x86

Uiautomationcore.dll

7.0.0.0

562,176

27-Jul-2011

04:31

x86

Wow64_uiautomationcore.ptxml

Not Applicable

1,054

13-Jul-2009

20:31

Not Applicable

Uiautomationcore.dll

7.0.0.0

562,176

27-Jul-2011

04:28

x86

Wow64_uiautomationcore.ptxml

Not Applicable

1,054

13-Jul-2009

20:31

Not Applicable

Uiautomationcore.dll

7.0.0.0

561,664

27-Jul-2011

04:29

x86

Wow64_uiautomationcore.ptxml

Not Applicable

1,054

13-Jul-2009

20:31

Not Applicable

Uiautomationcore.dll

7.0.0.0

561,664

27-Jul-2011

05:51

x86

Wow64_uiautomationcore.ptxml

Not Applicable

1,054

13-Jul-2009

20:31

Not Applicable

Actxprxy.dll

6.1.7600.21016

309,760

27-Jul-2011

04:25

x86

Dui70.dll

6.1.7600.16856

717,824

27-Jul-2011

04:29

x86

Dui70.dll

6.1.7600.21016

717,824

27-Jul-2011

04:26

x86

Dui70.dll

6.1.7601.17658

717,824

27-Jul-2011

04:25

x86

Dui70.dll

6.1.7601.21779

717,824

27-Jul-2011

05:45

x86

Status

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

More Information

For more information about assistive technology products for Windows, visit the following Microsoft website:

General information about assistive technology products for WindowsFor more information about accessibility, visit the following Microsoft Developer Network (MSDN) website:

General information about accessibilityFor more information about Windows events, visit the following MSDN website:

General information about Windows eventsFor more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information

Additional file information for Windows 7

Additional files for all supported x86-based versions of Windows 7

File name

Update.mum

File version

Not Applicable

File size

3,319

Date (UTC)

27-Jul-2011

Time (UTC)

21:46

Platform

Not Applicable

File name

X86_microsoft-windows-activexproxy_31bf3856ad364e35_6.1.7600.21016_none_12bab7bc64820696.manifest

File version

Not Applicable

File size

475,993

Date (UTC)

27-Jul-2011

Time (UTC)

04:57

Platform

Not Applicable

File name

X86_microsoft-windows-dui70_31bf3856ad364e35_6.1.7600.16856_none_57ac7f805f5513af.manifest

File version

Not Applicable

File size

16,537

Date (UTC)

27-Jul-2011

Time (UTC)

04:51

Platform

Not Applicable

File name

X86_microsoft-windows-dui70_31bf3856ad364e35_6.1.7600.21016_none_5861341d785276f7.manifest

File version

Not Applicable

File size

16,537

Date (UTC)

27-Jul-2011

Time (UTC)

04:50

Platform

Not Applicable

File name

X86_microsoft-windows-dui70_31bf3856ad364e35_6.1.7601.17658_none_5994dd1a5c79b249.manifest

File version

Not Applicable

File size

16,537

Date (UTC)

27-Jul-2011

Time (UTC)

04:52

Platform

Not Applicable

File name

X86_microsoft-windows-dui70_31bf3856ad364e35_6.1.7601.21779_none_5a09da5775a6a34c.manifest

File version

Not Applicable

File size

16,537

Date (UTC)

27-Jul-2011

Time (UTC)

06:22

Platform

Not Applicable

File name

X86_microsoft-windows-explorerframe_31bf3856ad364e35_6.1.7600.16856_none_c274d912d50b3392.manifest

File version

Not Applicable

File size

46,850

Date (UTC)

27-Jul-2011

Time (UTC)

04:59

Platform

Not Applicable

File name

X86_microsoft-windows-explorerframe_31bf3856ad364e35_6.1.7600.21016_none_c3298dafee0896da.manifest

File version

Not Applicable

File size

46,850

Date (UTC)

27-Jul-2011

Time (UTC)

04:58

Platform

Not Applicable

File name

X86_microsoft-windows-explorerframe_31bf3856ad364e35_6.1.7601.17658_none_c45d36acd22fd22c.manifest

File version

Not Applicable

File size

46,850

Date (UTC)

27-Jul-2011

Time (UTC)

04:57

Platform

Not Applicable

File name

X86_microsoft-windows-explorerframe_31bf3856ad364e35_6.1.7601.21779_none_c4d233e9eb5cc32f.manifest

File version

Not Applicable

File size

46,850

Date (UTC)

27-Jul-2011

Time (UTC)

06:28

Platform

Not Applicable

File name

X86_microsoft-windows-uiautomationcore_31bf3856ad364e35_6.1.7600.16856_none_b010634ea3563148.manifest

File version

Not Applicable

File size

170,525

Date (UTC)

27-Jul-2011

Time (UTC)

05:00

Platform

Not Applicable

File name

X86_microsoft-windows-uiautomationcore_31bf3856ad364e35_6.1.7600.21016_none_b0c517ebbc539490.manifest

File version

Not Applicable

File size

170,525

Date (UTC)

27-Jul-2011

Time (UTC)

04:59

Platform

Not Applicable

File name

X86_microsoft-windows-uiautomationcore_31bf3856ad364e35_6.1.7601.17658_none_b1f8c0e8a07acfe2.manifest

File version

Not Applicable

File size

170,525

Date (UTC)

27-Jul-2011

Time (UTC)

04:59

Platform

Not Applicable

File name

X86_microsoft-windows-uiautomationcore_31bf3856ad364e35_6.1.7601.21779_none_b26dbe25b9a7c0e5.manifest

File version

Not Applicable

File size

170,525

Date (UTC)

27-Jul-2011

Time (UTC)

06:34

Platform

Not Applicable

Additional files for all supported x64-based versions of Windows 7

File name

Amd64_microsoft-windows-activexproxy_31bf3856ad364e35_6.1.7600.21016_none_6ed953401cdf77cc.manifest

File version

Not Applicable

File size

475,995

Date (UTC)

27-Jul-2011

Time (UTC)

06:19

Platform

Not Applicable

File name

Amd64_microsoft-windows-dui70_31bf3856ad364e35_6.1.7600.16856_none_b3cb1b0417b284e5.manifest

File version

Not Applicable

File size

16,541

Date (UTC)

27-Jul-2011

Time (UTC)

06:17

Platform

Not Applicable

File name

Amd64_microsoft-windows-dui70_31bf3856ad364e35_6.1.7600.21016_none_b47fcfa130afe82d.manifest

File version

Not Applicable

File size

16,541

Date (UTC)

27-Jul-2011

Time (UTC)

06:16

Platform

Not Applicable

File name

Amd64_microsoft-windows-dui70_31bf3856ad364e35_6.1.7601.17658_none_b5b3789e14d7237f.manifest

File version

Not Applicable

File size

16,541

Date (UTC)

27-Jul-2011

Time (UTC)

06:20

Platform

Not Applicable

File name

Amd64_microsoft-windows-dui70_31bf3856ad364e35_6.1.7601.21779_none_b62875db2e041482.manifest

File version

Not Applicable

File size

16,541

Date (UTC)

27-Jul-2011

Time (UTC)

07:01

Platform

Not Applicable

File name

Amd64_microsoft-windows-explorerframe_31bf3856ad364e35_6.1.7600.16856_none_1e9374968d68a4c8.manifest

File version

Not Applicable

File size

46,854

Date (UTC)

27-Jul-2011

Time (UTC)

06:25

Platform

Not Applicable

File name

Amd64_microsoft-windows-explorerframe_31bf3856ad364e35_6.1.7600.21016_none_1f482933a6660810.manifest

File version

Not Applicable

File size

46,854

Date (UTC)

27-Jul-2011

Time (UTC)

06:21

Platform

Not Applicable

File name

Amd64_microsoft-windows-explorerframe_31bf3856ad364e35_6.1.7601.17658_none_207bd2308a8d4362.manifest

File version

Not Applicable

File size

46,854

Date (UTC)

27-Jul-2011

Time (UTC)

06:27

Platform

Not Applicable

File name

Amd64_microsoft-windows-explorerframe_31bf3856ad364e35_6.1.7601.21779_none_20f0cf6da3ba3465.manifest

File version

Not Applicable

File size

46,854

Date (UTC)

27-Jul-2011

Time (UTC)

07:07

Platform

Not Applicable

File name

Amd64_microsoft-windows-uiautomationcore_31bf3856ad364e35_6.1.7600.16856_none_0c2efed25bb3a27e.manifest

File version

Not Applicable

File size

170,529

Date (UTC)

27-Jul-2011

Time (UTC)

06:29

Platform

Not Applicable

File name

Amd64_microsoft-windows-uiautomationcore_31bf3856ad364e35_6.1.7600.21016_none_0ce3b36f74b105c6.manifest

File version

Not Applicable

File size

170,529

Date (UTC)

27-Jul-2011

Time (UTC)

06:25

Platform

Not Applicable

File name

Amd64_microsoft-windows-uiautomationcore_31bf3856ad364e35_6.1.7601.17658_none_0e175c6c58d84118.manifest

File version

Not Applicable

File size

170,529

Date (UTC)

27-Jul-2011

Time (UTC)

06:31

Platform

Not Applicable

File name

Amd64_microsoft-windows-uiautomationcore_31bf3856ad364e35_6.1.7601.21779_none_0e8c59a97205321b.manifest

File version

Not Applicable

File size

170,529

Date (UTC)

27-Jul-2011

Time (UTC)

07:10

Platform

Not Applicable

File name

Update-bf.mum

File version

Not Applicable

File size

4,107

Date (UTC)

27-Jul-2011

Time (UTC)

21:46

Platform

Not Applicable

File name

Update.mum

File version

Not Applicable

File size

4,189

Date (UTC)

27-Jul-2011

Time (UTC)

21:46

Platform

Not Applicable

File name

Wow64_microsoft-windows-explorerframe_31bf3856ad364e35_6.1.7600.16856_none_28e81ee8c1c966c3.manifest

File version

Not Applicable

File size

46,504

Date (UTC)

27-Jul-2011

Time (UTC)

04:47

Platform

Not Applicable

File name

Wow64_microsoft-windows-explorerframe_31bf3856ad364e35_6.1.7600.21016_none_299cd385dac6ca0b.manifest

File version

Not Applicable

File size

46,504

Date (UTC)

27-Jul-2011

Time (UTC)

04:44

Platform

Not Applicable

File name

Wow64_microsoft-windows-explorerframe_31bf3856ad364e35_6.1.7601.17658_none_2ad07c82beee055d.manifest

File version

Not Applicable

File size

46,504

Date (UTC)

27-Jul-2011

Time (UTC)

04:45

Platform

Not Applicable

File name

Wow64_microsoft-windows-explorerframe_31bf3856ad364e35_6.1.7601.21779_none_2b4579bfd81af660.manifest

File version

Not Applicable

File size

46,504

Date (UTC)

27-Jul-2011

Time (UTC)

06:12

Platform

Not Applicable

File name

Wow64_microsoft-windows-uiautomationcore_31bf3856ad364e35_6.1.7600.16856_none_1683a92490146479.manifest

File version

Not Applicable

File size

169,200

Date (UTC)

27-Jul-2011

Time (UTC)

04:48

Platform

Not Applicable

File name

Wow64_microsoft-windows-uiautomationcore_31bf3856ad364e35_6.1.7600.21016_none_17385dc1a911c7c1.manifest

File version

Not Applicable

File size

169,200

Date (UTC)

27-Jul-2011

Time (UTC)

04:45

Platform

Not Applicable

File name

Wow64_microsoft-windows-uiautomationcore_31bf3856ad364e35_6.1.7601.17658_none_186c06be8d390313.manifest

File version

Not Applicable

File size

169,200

Date (UTC)

27-Jul-2011

Time (UTC)

04:46

Platform

Not Applicable

File name

Wow64_microsoft-windows-uiautomationcore_31bf3856ad364e35_6.1.7601.21779_none_18e103fba665f416.manifest

File version

Not Applicable

File size

169,200

Date (UTC)

27-Jul-2011

Time (UTC)

06:13

Platform

Not Applicable

File name

X86_microsoft-windows-activexproxy_31bf3856ad364e35_6.1.7600.21016_none_12bab7bc64820696.manifest

File version

Not Applicable

File size

475,993

Date (UTC)

27-Jul-2011

Time (UTC)

04:57

Platform

Not Applicable

File name

X86_microsoft-windows-dui70_31bf3856ad364e35_6.1.7600.16856_none_57ac7f805f5513af.manifest

File version

Not Applicable

File size

16,537

Date (UTC)

27-Jul-2011

Time (UTC)

04:51

Platform

Not Applicable

File name

X86_microsoft-windows-dui70_31bf3856ad364e35_6.1.7600.21016_none_5861341d785276f7.manifest

File version

Not Applicable

File size

16,537

Date (UTC)

27-Jul-2011

Time (UTC)

04:50

Platform

Not Applicable

File name

X86_microsoft-windows-dui70_31bf3856ad364e35_6.1.7601.17658_none_5994dd1a5c79b249.manifest

File version

Not Applicable

File size

16,537

Date (UTC)

27-Jul-2011

Time (UTC)

04:52

Platform

Not Applicable

File name

X86_microsoft-windows-dui70_31bf3856ad364e35_6.1.7601.21779_none_5a09da5775a6a34c.manifest

File version

Not Applicable

File size

16,537

Date (UTC)

27-Jul-2011

Time (UTC)

06:22

Platform

Not Applicable

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