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c68841a733
Use `ShellExecuteExW` instead of `ShellExecuteW` to pass the additional flag `SEE_MASK_NOASYNC`. This should ensure that DDE (Dynamic data exchange) conversations are finished before the function returns, as it would otherwise be necessary to manually pump messages on the calling thread. DDE conversations may be initiated when shell extensions are loaded via `ShellExecute`. Failing to answer the DDE messages will block the calling UI thread and may cause a dead-lock. The flag `SEE_MASK_FLAG_NO_UI` is used to prevent native error message popups when the link/file cannot be opened. Additionally, the `ShellExecute` verb is changed from `"open"` to `NULL`, which will cause the default shell handler to be used instead, as the `"open"` verb may not be available for all targets. Though for most targets it will be the default verb anyway. References: - https://learn.microsoft.com/en-us/windows/win32/api/shellapi/nf-shellapi-shellexecutew - https://learn.microsoft.com/en-us/windows/win32/api/shellapi/ns-shellapi-shellexecuteinfow - https://devblogs.microsoft.com/oldnewthing/20070430-00/?p=27063 - https://learn.microsoft.com/en-us/windows/win32/dataxchg/about-dynamic-data-exchange Yet another attempt at solving #5744. |
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