MessageBox changes Japanese IME Input Mode

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I have a simple c# windows form with a textbox and button that, when clicked,
displays a simple MessageBox.

With the cursor in the textbox, I can select the Japanese language and
desired Input Mode (Hiragana, Full-Width Katakana, etc) from the IME toolbar.
However, when the click on the button to display the MessageBox then return
to the text, the Input Mode on the IME switches to "Direct Input", regardless
of what it was originally set to. The IME language remains Japanese, but the
Input Mode changes.

Any ideas why this occurs?

[Linda Liu [MSFT]]

Hi,

I performed a test based on your description and did see the problem on my
side.

When I click the button and a message box pops up, the IME is disabled,
because the message box doesn't support IME input by default. After I close
the message box and get the text box focused again, the IME is enabled
again, but the input mode is not turned on.

By default, a TextBox's ImeMode property is set to Inherit. However, its
parent form's ImeMode property is set to NoControl by default. So the value
of the TextBox's ImeMode property is NoControl as well.

We could set the TextBox's ImeMode property to On to turn on the IME input
mode when it get focused. This should be the solution to solve your prolem.

Please try my suggestion and let me know the result.

Sincerely,
Linda Liu
Microsoft Online Community Support

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[Linda Liu [MSFT]]

Hi,

How about the problem now?

If the problem is still not resolved, please feel free to let me know.

Thank you for using our MSDN Managed Newsgroup Support Service!

Sincerely,
Linda Liu
Microsoft Online Community Support