https://github.com/bitcoin/bitcoin/blob/63f8b0128b2aac3b25c6ec4d2f5bda213033162a/src/qt/guiutil.cpp#L548
it's (at least)a bit risky outside of single-thread apps.
CoInitializeEx(NULL,COINIT_MULTITHREADED);
could be used instead. Only way i know to use it is to make separate thread with init-wait-uninit
UI threads should and in many cases must be introduced into STA apartments, so CoInitialize is fine.
nothing stops you to introduce(?) it in another thread as mta and then use in gui one. 'should' is a wrong word here . There're cases where it must not ,say IID_ITaskbarList3 .i wanna add it here soon .In current case may be it's safe ,i didnt catch this stuff with shortcuts so cant say more. It's a warning My bet is all part iscopy-pasted from somewhere.
Putting main thread into MTA apartment is not something you usually want in a GUI application. OLE stuff (shell, clipboard, controls hosting, property pages, etc) is designed to work in STA.
I don't see what is the risk that you mentioned.
just checked msdn ,looks like it will work if this qt hack provides message queue