主题：暂停播放

各位大侠:按照下面网址的窗口编制了一个朗读的窗口,请问如何点击一个"暂停"按钮后朗读暂停,再点击"继续"按钮后朗读继续

:http://www.foxtable.com/help/topics/2240.htm

不好意思,我还是不懂

我目前的"播放"按钮设置

Dim yy As WinForm.ListBox = e.Form.Controls("ListBox1")
Dim sp As New DotNetSpeech.SpVoice()
Dim vl As String = e.Form.Controls("txtContent").Value '获得要朗读的文本
sp.Rate = e.Form.Controls("boxSpeed").Value '设置语速
sp.Voice = sp.GetVoices(String.Empty,String.Empty).Item(yy.SelectedIndex) '选择语音库
If  e.Form.Controls("rdoAsync").Checked Then
    sp.Speak(vl, DotNetSpeech.SpeechVoiceSpeakFlags.SVSFlagsAsync) '异步朗读
Else
    sp.Speak(vl, DotNetSpeech.SpeechVoiceSpeakFlags.SVSFDefault) '同步朗读
End If

那么暂停按钮如何写入代码?

谢谢