c# 4.0 - Close single tab of IExplore in C# -

i stuck in problem, i.e. how close single particular tab in internet explorer.

i can use shdocvw.dll solve problem, wondering there other alternate solution problem, have in openspan technology based on .net , there unable add reference of shdocvw.dll in project throwing error message as- "invalid project reference file".

thanks in-advance !!!

have tried "microsoft internet controls" com tab. see reference link below.

cannot add "c:\windows\system32\shdocvw.dll" project