private void myJobManager_Stopped(object sender,CogJobManagerActionEventArgs e)
        {
            if (InvokeRequired)
            {
                Invoke(new myJobManagerDelegate(myJobManager_Stopped),
                  new object[] { sender, e });

                return;
            }

            RunOnceButton.Enabled = true;
            RunContCheckBox.Enabled = true;  // Enable when stopped

        }

不明白为什么InvokeRequired的返回值，什么情况下变化