# aardio 范例: Web Form - 自定义 User Agent
```aardio
//更改 UserAgent
import win.ui;
/*DSG{{*/
var winform = win.form(text="Web Form - 自定义 User Agent";right=759;bottom=469)
winform.add()
/*}}*/
import web.form;
var wb = web.form( winform,,,"web.form",true);
import wsock.tcp.simpleHttpServer;
var url = wsock.tcp.simpleHttpServer.startUrl(,,
function(response,request){
response.write("")
response.write("User Agent:")
response.write(request.headers["user-agent"])
}
)
wb.go(url);
winform.show(true);
win.loopMessage();
```