https://learn.microsoft.com/ja-jp/dotnet/api/system.runtime.interopservices.marshal.getobjectfornativevariant?view=netframework-4.8.1&viewFallbackFrom=net-10.0
Marshal.GetObjectForNativeVariant Method (System.Runtime.InteropServices) | Microsoft Learn
Converts a COM VARIANT to an object.
marshalmethodsystemruntimemicrosoft