public override int SetGuidProperty(int propid, ref Guid guid) { switch ((__VSHPROPID) propid) { case __VSHPROPID.VSHPROPID_ProjectIDGuid: ProjectIDGuid = guid; return VSConstants.S_OK; } CCITracing.TraceCall(string.Format(CultureInfo.CurrentCulture, "Property {0} not found", propid)); return VSConstants.DISP_E_MEMBERNOTFOUND; }