I'm not and API expert but I was trying to work on a macro to control the Tree Display settings.  

I found the function "SetComponentIdentifiers" but I think there is an issue with the Tertiary setting.

I can check the box but i cannot UNCHECK the Box.

The definition is:

          value = instance.SetComponentIdentifiers(Primary, Secondary, Tertiary)

In my code, this will check the Tertiary Box:

          compIdentifierRet = swFeatMgr.SetComponentIdentifiers(2, 0, 128)

But This will NOT uncheck the Tertiary box

          compIdentifierRet = swFeatMgr.SetComponentIdentifiers(2, 0, 0)

The component identifiers are:

Please advise. Thanks!