public static int GetNameDispId(UnsafeNativeMethods.IDispatch obj) { int num = -1; string[] rgszNames = null; ComNativeDescriptor instance = ComNativeDescriptor.Instance; bool succeeded = false; instance.GetPropertyValue(obj, "__id", ref succeeded); if (succeeded) { rgszNames = new string[] { "__id" }; } else { instance.GetPropertyValue(obj, -800, ref succeeded); if (succeeded) { num = -800; } else { instance.GetPropertyValue(obj, "Name", ref succeeded); if (succeeded) { rgszNames = new string[] { "Name" }; } } } if (rgszNames != null) { int[] rgDispId = new int[] { -1 }; Guid empty = Guid.Empty; if (System.Windows.Forms.NativeMethods.Succeeded(obj.GetIDsOfNames(ref empty, rgszNames, 1, SafeNativeMethods.GetThreadLCID(), rgDispId))) { num = rgDispId[0]; } } return num; }