IWICMetadataQueryWriter.SetMetadataByName

Undocumented in source but is binding to Windows. You might be able to learn more by searching the web for its name.
interface IWICMetadataQueryWriter
extern (Windows)
HRESULT
SetMetadataByName
(
LPCWSTR wzName
,
const(PROPVARIANT)* pvarValue
)

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