title: How to get IVsRegisterProjectSelector interface object in VSSDK
body: <p>As new to VS extension devlopment, we are tyring to register the custom IVsProjectSelector for our exntension written in <strong>C++</strong> . While querying IVsRegisterProjectSelector  from IVsProjectSelector  we are always getting NULL.</p>
  <p>Not sure how to register our ProjectSelector</p>