A combo box control selects an unexpected value in Windows 7 SP 1 or Windows Server 2008 R2

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Article ID: 2868238 - View products that this article applies to.
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Symptoms

Consider the following scenario:
  • You have a computer that is running Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2. 
  • You have a Windows Form application that contains a combo box control and other controls on the computer.
  • The combo box control is put on a form and populated with a list of values. For example, the combo box control is populated with the following values:
    • a0 
    • a1 
    • a2 
    • a3 
    • a4 
    • a5
  • The DropDownStyle property is set to DropDownList, and the AutoCompleteMode property is set to Append or to SuggestAppend.
  • You follow these steps:
    1. You click the combo box control by using the mouse. A drop-down list appears.
    2. You type a4. This highlights the correct item in the list.
    3. You press the Tab key to move the focus to the next control.

In this scenario, the combo box control selects a0. However, you expect the control to select a4.

Cause

This problem occurs because the index of the selected item is reset when the control loses the focus.

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, go to the following Microsoft website:
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 or Windows Server 2008 R2 Service Pack 1.

Restart requirement

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

Hotfix replacement information

This hotfix does not replace any previously released hotfix.

File information

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The English (United States) 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
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.
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    VersionProductSR_LevelService branch
    6.1.760 1 . 22xxxWindows 7 and Windows Server 2008 R2SP1LDR
  • GDR service branches contain only those fixes that are widely released to address widespread, extremely important issues. LDR service branches contain hotfixes in addition to widely released fixes.
  • 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 7 and Windows Server 2008 R2" 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
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File nameFile versionFile sizeDateTimePlatform
Comctl32.dll6.10.7601.223761,680,89604-Jul-201311:53x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
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File nameFile versionFile sizeDateTimePlatform
Comctl32.dll6.10.7601.223762,030,59204-Jul-201312:09x64
Comctl32.dll6.10.7601.223761,680,89604-Jul-201311:53x86
For all supported IA-64-based versions of Windows Server 2008 R2
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File nameFile versionFile sizeDateTimePlatform
Comctl32.dll6.10.7601.223764,762,62404-Jul-201311:14IA-64
Comctl32.dll6.10.7601.223761,680,89604-Jul-201311:53x86
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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.

References

See ComboBox Class for information about the Windows combo box control.

See the terminology Microsoft uses to describe software updates.

Additional file information

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Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7
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File nameX86_4f846e611430ac4b84b660557210971c_6595b64144ccf1df_6.0.7601.22376_none_fbb63ae8cab89b8d.manifest
File versionNot applicable
File size635
Date (UTC)04-Jul-2013
Time (UTC)20:43
PlatformNot applicable
File nameX86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.22376_none_2b1ec71c45791a38.manifest
File versionNot applicable
File size3,723
Date (UTC)04-Jul-2013
Time (UTC)12:47
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
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File nameAmd64_070d1fb10385e2e07c9247d149b745e7_6595b64144ccf1df_6.0.7601.22376_none_cf45f84b796be05c.manifest
File versionNot applicable
File size938
Date (UTC)04-Jul-2013
Time (UTC)20:43
PlatformNot applicable
File nameAmd64_4f846e611430ac4b84b660557210971c_6595b64144ccf1df_6.0.7601.22376_none_57d4d66c83160cc3.manifest
File versionNot applicable
File size637
Date (UTC)04-Jul-2013
Time (UTC)20:43
PlatformNot applicable
File nameAmd64_e9470076ae3027ad7c07e034fdf547e3_6595b64144ccf1df_6.0.7601.22376_none_62634870a5ea218b.manifest
File versionNot applicable
File size639
Date (UTC)04-Jul-2013
Time (UTC)20:43
PlatformNot applicable
File nameAmd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.22376_none_e371904530fcf132.manifest
File versionNot applicable
File size3,729
Date (UTC)04-Jul-2013
Time (UTC)13:00
PlatformNot applicable
File nameX86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.22376_none_2b1ec71c45791a38.manifest
File versionNot applicable
File size3,723
Date (UTC)04-Jul-2013
Time (UTC)12:47
PlatformNot applicable
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameIa64_cbc0c58f581f9d4ae9b7669ddf205662_6595b64144ccf1df_6.0.7601.22376_none_ea9f5632b8baf098.manifest
File versionNot applicable
File size936
Date (UTC)04-Jul-2013
Time (UTC)20:43
PlatformNot applicable
File nameIa64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.22376_none_2b1ea4de4579521c.manifest
File versionNot applicable
File size3,726
Date (UTC)04-Jul-2013
Time (UTC)12:19
PlatformNot applicable
File nameX86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.22376_none_2b1ec71c45791a38.manifest
File versionNot applicable
File size3,723
Date (UTC)04-Jul-2013
Time (UTC)12:47
PlatformNot applicable
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Properties

Article ID: 2868238 - Last Review: August 13, 2013 - Revision: 1.0
Applies to
  • Windows 7 Service Pack 1, when used with:
    • Windows 7 Enterprise
    • Windows 7 Professional
    • Windows 7 Ultimate
  • Windows Server 2008 R2 Service Pack 1, when used with:
    • Windows Server 2008 R2 Datacenter
    • Windows Server 2008 R2 Enterprise
    • Windows Server 2008 R2 Standard
Keywords: 
kbautohotfix kbqfe kbhotfixserver kbfix kbexpertiseinter kbsurveynew kbbug KB2868238

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