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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=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 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.

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 notesImportant 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.

    Version

    Product

    SR_Level

    Service branch

    6.1.760
    1.
    22xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • 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

File name

File version

File size

Date

Time

Platform

Comctl32.dll

6.10.7601.22376

1,680,896

04-Jul-2013

11:53

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Comctl32.dll

6.10.7601.22376

2,030,592

04-Jul-2013

12:09

x64

Comctl32.dll

6.10.7601.22376

1,680,896

04-Jul-2013

11:53

x86

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Comctl32.dll

6.10.7601.22376

4,762,624

04-Jul-2013

11:14

IA-64

Comctl32.dll

6.10.7601.22376

1,680,896

04-Jul-2013

11:53

x86


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 for Windows 7 and for Windows Server 2008 R2

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

File name

X86_4f846e611430ac4b84b660557210971c_6595b64144ccf1df_6.0.7601.22376_none_fbb63ae8cab89b8d.manifest

File version

Not applicable

File size

635

Date (UTC)

04-Jul-2013

Time (UTC)

20:43

Platform

Not applicable

File name

X86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.22376_none_2b1ec71c45791a38.manifest

File version

Not applicable

File size

3,723

Date (UTC)

04-Jul-2013

Time (UTC)

12:47

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

Amd64_070d1fb10385e2e07c9247d149b745e7_6595b64144ccf1df_6.0.7601.22376_none_cf45f84b796be05c.manifest

File version

Not applicable

File size

938

Date (UTC)

04-Jul-2013

Time (UTC)

20:43

Platform

Not applicable

File name

Amd64_4f846e611430ac4b84b660557210971c_6595b64144ccf1df_6.0.7601.22376_none_57d4d66c83160cc3.manifest

File version

Not applicable

File size

637

Date (UTC)

04-Jul-2013

Time (UTC)

20:43

Platform

Not applicable

File name

Amd64_e9470076ae3027ad7c07e034fdf547e3_6595b64144ccf1df_6.0.7601.22376_none_62634870a5ea218b.manifest

File version

Not applicable

File size

639

Date (UTC)

04-Jul-2013

Time (UTC)

20:43

Platform

Not applicable

File name

Amd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.22376_none_e371904530fcf132.manifest

File version

Not applicable

File size

3,729

Date (UTC)

04-Jul-2013

Time (UTC)

13:00

Platform

Not applicable

File name

X86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.22376_none_2b1ec71c45791a38.manifest

File version

Not applicable

File size

3,723

Date (UTC)

04-Jul-2013

Time (UTC)

12:47

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File name

Ia64_cbc0c58f581f9d4ae9b7669ddf205662_6595b64144ccf1df_6.0.7601.22376_none_ea9f5632b8baf098.manifest

File version

Not applicable

File size

936

Date (UTC)

04-Jul-2013

Time (UTC)

20:43

Platform

Not applicable

File name

Ia64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.22376_none_2b1ea4de4579521c.manifest

File version

Not applicable

File size

3,726

Date (UTC)

04-Jul-2013

Time (UTC)

12:19

Platform

Not applicable

File name

X86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.22376_none_2b1ec71c45791a38.manifest

File version

Not applicable

File size

3,723

Date (UTC)

04-Jul-2013

Time (UTC)

12:47

Platform

Not applicable


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