IMMDeviceVtable.Activate

Undocumented in source but is binding to Windows. You might be able to learn more by searching the web for its name.

struct IMMDeviceVtable

extern (Windows) @nogc nothrow

HRESULT function(This_, REFIID iid, DWORD dwClsCtx, PROPVARIANT* pActivationParams, void** ppInterface) Activate;

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