How to used InsertMacroFeature3 in windows form (exe app)

Hi Team, I am trying to use InsertMacroFeature3() in Windows application, but every time it is returns null. I tried the same in addin it works but fails in windows application.
Do anyone knows how to use Same api in windows form.?
Thanks in advance.

swMacroFeat = swFeatMgr.InsertMacroFeature3("Demo1", "MacroFeat.Class1", "", null, null, null, null, null, null, null, (int)swMacroFeatureOptions_e.swMacroFeatureAlwaysAtEnd);

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A question definitely for @artem !

Make sure your macro feature definition class is registered for COM

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