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  2. GetKeyState function does not work when you use the AttachThreadInput function to attach an input processing mechanism to a thread in Windows 7 or in Windows Server 2008 R2

GetKeyState function does not work when you use the AttachThreadInput function to attach an input processing mechanism to a thread in Windows 7 or in Windows Server 2008 R2

View products that this article applies to.

Symptoms

Consider the following scenario:
  • You use the AttachThreadInput function to attach the input processing mechanism of a thread to the input processing mechanism of another thread.
  • You press a key or click a mouse button.
  • When the input notification message (such as WM_KEYDOWN, WM_SYSKEYDOWN, or WM_LBUTTONDOWN) is being processed, you perform one of the following operations:
    • You use the AttachThreadInput function to reattach the input processing mechanism to the current thread.
    • You create a window that is owned by a window in a different thread or process.
  • A call is made to the GetKeyState function.
In this scenario, the GetKeyState function returns a key or mouse button state that is not the down state. However, the key or the mouse button should remain in the down state until a corresponding key or mouse button release message (such as WM_KEYUP, WMSYSKEYUP, WM_LBUTTONUP) is processed.

Notes
  • This issue affects any application that uses the GetKeyState function or the KeyState property in this scenario.
  • This issue does not affect the GetMessage and PeekMessage functions.
  • This issue may affect the TranslateMessage function and the keyboard character messages if the key that you press is a modifier key (such as Alt, Shift, Ctrl, or Caps Lock).

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Cause

This issue occurs because Windows creates a new input queue without copying the KeyState property in the scenario that is described in the "Symptoms" section. Therefore, the KeyState property of the new input queue has a null value. In this situation, every key and mouse button is in the up state or in the not toggled state.

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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=support
Note 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 Service Pack 1 (SP1) or Windows Server 2008 R2 Service Pack 1 (SP1).

For more information about how to obtain a Windows 7 or Windows Server 2008 R2 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 must 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 and Windows Server 2008 R2 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:
    VersionProductMilestoneService branch
    6.1.760
    1.22xxx    		Windows 7 and Windows Server 2008 R2SP1LDR
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2 and for Windows 7" section. MUM and 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 nameFile versionFile sizeDateTimePlatform
Win32k.sys6.1.7601.221712,354,68822-Nov-201203:23x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Win32k.sys6.1.7601.221713,151,87222-Nov-201203:28x64
For all supported IA-64-based versions of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Win32k.sys6.1.7601.221717,450,11222-Nov-201202:59IA-64

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Status

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

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More Information

For more information about the AttachThreadInput function, visit the following Microsoft website:
General information about the AttachThreadInput function
For more information about the TranslateMessage function, visit the following Microsoft website:
General information about the TranslateMessage function
For more information about the GetKeyState function, visit the following Microsoft website:
General information about the GetKeyState function
For more information about owned windows, visit the following Microsoft website:
General information about owned windows
For 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 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7
File nameUpdate.mum
File versionNot Applicable
File size2,136
Date (UTC)03-Dec-2012
Time (UTC)07:23
PlatformNot Applicable
File nameX86_fd2fc35fe4373c19d590e0ee80416b97_31bf3856ad364e35_6.1.7601.22171_none_a7d2efdf97c44f6b.manifest
File versionNot Applicable
File size694
Date (UTC)03-Dec-2012
Time (UTC)07:23
PlatformNot Applicable
File nameX86_microsoft-windows-win32k_31bf3856ad364e35_6.1.7601.22171_none_bb407fc5121a0614.manifest
File versionNot Applicable
File size42,086
Date (UTC)22-Nov-2012
Time (UTC)07:18
PlatformNot Applicable
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameAmd64_25d80f3c376d04ea1b3fb47d86c7b8f3_31bf3856ad364e35_6.1.7601.22171_none_50b5bc5d6e7adcd6.manifest
File versionNot Applicable
File size698
Date (UTC)03-Dec-2012
Time (UTC)07:23
PlatformNot Applicable
File nameAmd64_839f36abcfe62f0b78d9cfd048c05f38_31bf3856ad364e35_6.1.7601.22171_none_87e3cd15f8efad81.manifest
File versionNot Applicable
File size1,038
Date (UTC)03-Dec-2012
Time (UTC)07:23
PlatformNot Applicable
File nameAmd64_c781921f88855a4aaa2b9f714cb45579_31bf3856ad364e35_6.1.7601.22171_none_c35757d4574ba632.manifest
File versionNot Applicable
File size698
Date (UTC)03-Dec-2012
Time (UTC)07:23
PlatformNot Applicable
File nameAmd64_microsoft-windows-win32k_31bf3856ad364e35_6.1.7601.22171_none_175f1b48ca77774a.manifest
File versionNot Applicable
File size42,090
Date (UTC)22-Nov-2012
Time (UTC)06:42
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size2,773
Date (UTC)03-Dec-2012
Time (UTC)07:23
PlatformNot Applicable
File nameWow64_microsoft-windows-win32k_31bf3856ad364e35_6.1.7601.22171_none_21b3c59afed83945.manifest
File versionNot Applicable
File size4,178
Date (UTC)22-Nov-2012
Time (UTC)07:12
PlatformNot Applicable
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
File nameIa64_9e3e98b4e41a8661b469314df6d0f9cc_31bf3856ad364e35_6.1.7601.22171_none_1cfeace1b00a5ed0.manifest
File versionNot Applicable
File size1,036
Date (UTC)03-Dec-2012
Time (UTC)07:23
PlatformNot Applicable
File nameIa64_microsoft-windows-win32k_31bf3856ad364e35_6.1.7601.22171_none_bb4223bb12180f10.manifest
File versionNot Applicable
File size42,088
Date (UTC)22-Nov-2012
Time (UTC)06:39
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size1,447
Date (UTC)03-Dec-2012
Time (UTC)07:23
PlatformNot Applicable
File nameWow64_microsoft-windows-win32k_31bf3856ad364e35_6.1.7601.22171_none_21b3c59afed83945.manifest
File versionNot Applicable
File size4,178
Date (UTC)22-Nov-2012
Time (UTC)07:12
PlatformNot Applicable

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Keywords: kb, kbautohotfix, kbqfe, kbhotfixserver, kbfix, kbsurveynew, kbexpertiseadvanced

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Article Info
Article ID : 2581582
Revision : 1
Created on : 3/21/2017
Published on : 1/9/2013
Exists online : False
Views : 271