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.