On Mon, 11 Dec 2023 20:38:46 GMT, Sergey Bylokhov <s...@openjdk.org> wrote:

> A previous call to 
> [CoInitializeEx](https://learn.microsoft.com/en-us/windows/desktop/api/combaseapi/nf-combaseapi-coinitializeex)
>  specified the concurrency model for this thread as multithread apartment 
> (MTA). This could also indicate that a change from neutral-threaded apartment 
> to single-threaded apartment has occurred.

It's confusing, and [Neutral 
Apartments](https://learn.microsoft.com/en-us/windows/win32/cossdk/neutral-apartments)
 does not clarify anything. [The Apartment and the COM Threading 
Architecture](https://learn.microsoft.com/en-us/windows/win32/com/processes--threads--and-apartments#the-apartment-and-the-com-threading-architecture)
 section in “Processes, Threads, and Apartments” article doesn't mention 
*neutral* at all.

At the same time, I am sure the transition from STA to MTA or from MTA to STA 
is not possible.

-------------

PR Comment: https://git.openjdk.org/jdk/pull/17010#issuecomment-1850881527

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