Antoine Pitrou created ARROW-16617:
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Summary: [C++] WinErrorMessage() should not use Windows ANSI APIs
Key: ARROW-16617
URL: https://issues.apache.org/jira/browse/ARROW-16617
Project: Apache Arrow
Issue Type: Bug
Components: C++
Reporter: Antoine Pitrou
The {{WinErrorMessage}} utility function calls {{FormatMessageA}} in order to
get the Windows error message. This unfortunately returns the message encoded
using the current "codepage", which can give unreadable results if there are
non-ASCII characters in it.
Instead, we should probably use {{FormatMessageW}} and then convert to UTF-8.
At least {{PyArrow}} expects the error message in a {{Status}} to be
utf8-encoded.
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