https://learn.microsoft.com/en-us/windows/win32/api/ole2/nf-ole2-olecreatefromfileex?redirectedfrom=MSDN
OleCreateFromFileEx function (ole2.h) - Win32 apps | Microsoft Learn
Extends OleCreateFromFile functionality by supporting more efficient instantiation of objects in containers requiring caching of multiple presentation formats...
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https://ole2.org/
ole2 - ole2