private void btnStart_Click(object sender, RoutedEventArgs e)
{
var loginParams = "appid = 5b0dfbb4, work_dir = .";
var sessionBeginParams = "sub = iat, domain = iat, language = zh_cn, accent = mandarin, sample_rate = 16000, result_type = plain, result_encoding = gb2312";
var startCall = new startFun(Start);
var stopCall = new stopFun(Stop);
var resultCall = new resultFun(Result);
var errorCall = new errorFun(Error);
var result = startupTask(loginParams, sessionBeginParams, startCall, stopCall, resultCall, errorCall);
}
extern static int startupTask(string loginParams, string sessionBeginParams,
startFun startCallback,
stopFun stopCallback,
resultFun resultCallback,
errorFun errorCallback);
