how to use sandcastle along with webservices

Question

Hi,
 i am using  trying the get msdn documentation for my webservice using Sandcastle

http://sandcastle.codeplex.com/

this is my webservice  file Service.asmx.cs
 which has  few dependancy liek the  dll  

using Microsoft.ApplicationBlocks.ExceptionManagement;
using Wiils.Security;
using Wiils.Utils;

C:\MSDNDoc>%SystemRoot%\Microsoft.NET\Framework\v4.0.30319\csc.exe /target:libra
ry /doc:Service1.xml Service.asmx.cs

Microsoft (R) Visual C# 2010 Compiler version 4.0.30319.1
Copyright (C) Microsoft Corporation. All rights reserved.

Service.asmx.cs(11,17): error CS0234: The type or namespace name
        'ApplicationBlocks' does not exist in the namespace 'Microsoft' (are you
        missing an assembly reference?)
Service.asmx.cs(12,17): error CS0234: The type or namespace name 'Security' does
        not exist in the namespace 'Tesco.NGC' (are you missing an assembly
        reference?)
Service.asmx.cs(13,17): error CS0234: The type or namespace name 'Utils' does
        not exist in the namespace 'Tesco.NGC' (are you missing an assembly
        reference?)

 when i am running this command  its  looking  for these  dll  how  should i provide the path so that my dll  is  also read here and  generates an  xml file
 
 Thanks
 Prince