Check if a user is a selected friend of another user. 

This method can be accessed through the Friends.asmx file located in:

~/Workarea/webservices/WebServiceAPI/Community/Friends.asmx

[SoapHeader("AuthHeader")]
[SoapHeader("RequestInfoHeader")]
[WebMethod(MessageName = "IsSelectedFriend", Description = "Check if a user is a selected friend of another user.")]
public bool IsSelectedFriend(long friendUserId, long userId);

<SoapHeader("AuthHeader")>
<SoapHeader("RequestInfoHeader")>
<WebMethod(MessageName = "IsSelectedFriend", Description = "Check if a user is a selected friend of another user.")>
Public Function IsSelectedFriend(friendUserId As long, userId As long) As bool