I use c # to fill in the user name password and domain can request success

 string userName="123"; 
String paw="123"; 

WST ws=new WST (); 

Ws. Credentials=new NetworkCredential (userName, paw, "aaa"); 

String resp.=ws WSTEST (" 321 "); 

Using Delphi call just set the user name password

 function GetWST_Port (UseWSDL: Boolean; Addr: string; HTTPRIO: THTTPRIO) : WST_Port; 
Const 
DefWSDL=' '; 
DefURL=' '; 
WST defSvc=' '; 
DefPrt='WST_Port'; 
Var 
RIO: THTTPRIO; 
The begin 
Result:=nil; 
If (Addr=' ') then 
The begin 
If UseWSDL then 
Addr:=defWSDL 
The else 
Addr:=defURL; 
end; 
If HTTPRIO=nil then 
RIO:=THTTPRIO. Create (nil) 
The else 
RIO:=HTTPRIO; 
Try 
Result:=(RIO as WST_Port); 
If UseWSDL then 
The begin 
RIO. WSDLLocation:=Addr; 
RIO. Service:=defSvc; 
RIO. Port:=defPrt; 
LTD HTTPWebNode. UserName:='123'; 
LTD HTTPWebNode. Password:='123'; 

End 
The else 
LTD URL:=Addr; 
The finally 
If (Result=nil) and (HTTPRIO=nil) then 
RIO. Free; 
end; 
end; 

There is also a domain parameters of how to set?