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There's no way to do this. RHistory library of Eikon COM APIs can only be used in Excel VBA, as it has a dependency on Eikon Excel COM add-in.
Using COM API in VBA code, suddenly cannot connect to Eikon Desktop
Excel x64 CreateReutersObject("AdfinXRtLib.AdxRtList") returns Nothing
.NET API getting NDA_RAW data
is it possible to integrate RSearch COM and EikonDesktopDataAPI in the same C# app ?
.NET API - Realtime eligibility