Re: [PATCH v5 0/1] MR9097: imm32: Do not overwrite input context window with GetFocus() in ime_ui_update_window.

[zhengyong chen (＠chenzhengyong)]

In CEF-based applications, ime_ui_update_window may be called from a different thread or process than the UI thread owning the input context. Directly modifying ctx-\>hWnd in such cases breaks the association between the HIMC handle and its window, which causes subsequent composition string retrieval (CompStr) to fail.

This change restricts ctx-\>hWnd updates to the UI thread to keep the input context consistent across threads and processes.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/9097#note_117634