/// <summary>
        ///   Customized container radius search which returns a list of simobject ID's in the radius.
        /// </summary>
        /// <param name="p"> </param>
        /// <param name="searchradius"> </param>
        /// <param name="searchmask"> </param>
        /// <param name="useclientcontainer"> </param>
        /// <returns> </returns>
        internal List<UInt32> ContainerRadiusSearch(Point3F p, double searchradius, UInt32 searchmask, bool useclientcontainer)
            {
            uint[] foundid = new UInt32[100];

            List<uint> lid = new List<uint>();

            Int32 countof = SafeNativeMethods.mContainerRadiusSearch(p.x, p.y, p.z, (float) searchradius, searchmask, useclientcontainer, foundid);

            if (countof > 0)

                for (int i = 0; i < foundid.GetUpperBound(0); i++)

                    lid.Add(foundid[i]);


            return lid;
            }