Add shadow receiver to 3D text shader.

Hi, as the subject I would like to add a shadow receiver to my 3D text shader (take from the unity wiki):

Below my code :

Shader "GUI/3D Text Shader" { Properties { _MainTex ("Font Texture", 2D) = "white" {} _Color ("Text Color", Color) = (1,1,1,1) }

 SubShader {
     Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" }
     Lighting Off Cull Off ZWrite Off Fog { Mode Off }
     Blend SrcAlpha OneMinusSrcAlpha
     Pass {
         Color [_Color]
         SetTexture [_MainTex] {
             combine primary, texture * primary
         }
     }
 }

}

Thanks