When you switch the focus between two applications on a Windows Vista-based computer, the IME Conversion Mode setting is not maintained as expected

Consider the following scenario:

• On a Windows Vista-based computer, you set the Default input language setting to Chinese (PRC) - Chinese (Simplified) - US Keyboard.
• On this same computer, you start a .NET WinForm application. Then, you set the focus to a text box in the application.
• You switch the Input Method Editor (IME) to Chinese (Simplified) - Microsoft Pinyin IME, and then you set the IME Conversion Mode to full-shape mode.
• You switch the focus to another application, and then you return the focus to the text box.

In this scenario, the IME Conversion Mode is unexpectedly changed to half-shape mode.

Note This issue occurs only the first time that you switch the focus. If the application continues running, the IME status is maintained as expected.

This issue occurs because the IME does not send the WM_IME_NOTIFY message the first time that you switch the IME conversion mode. Therefore, the .NET WinForm application does not obtain the latest IME conversion status. Instead, the application stores the incorrect IME status. Therefore, the application restores the incorrect IME status when a user returns the focus to the application.

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 this specific problem. 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: 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

No prerequisites are required.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other previously released hotfixes.

Registry information

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

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.

Windows Vista, x86-based versions

Windows Vista, x64-based versions

Windows Vista, IA-64-based versions

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 WM_IME_NOTIFY message, visit the following Microsoft Web site: For more information, click the following article number to view the article in the Microsoft Knowledge Base: