Can we please have clearer documentation on what the failure behavior of SetConsoleMode?

[zadjii-msft]

Can we please have clearer documentation in MSDN on what the failure behaviour of these functions is? For instance:

• It's not documented whether we need to set the buffer back to the original mode on failure.
• It's not documented what error codes we can expect to get from GetLastError and whether it's even possible to handle them (it could be any of 16000 errors!).
• It's not documented whether buffers and their modes persist when the program exits.

I understand the need to keep suboptimal behaviour because old versions of powershell were incorrect, but I need to know about it in advance so that I can make my programs correct.

Originally posted by @Gyross in microsoft/terminal#13738 (comment)

[Gyross]

Also:

• Which output modes are inherited when a new screen buffer is created. E.g.; I've seen ENABLE_VIRTUAL_TERMINAL_PROCESSING inherited, while other modes like ENABLE_WRAP_AT_EOL_OUTPUT are reset.

Thanks.