在VB中使用文字朗读引擎（TTS）技术现今市面上流行的一些英语学习软件，在广告词上经常说自己使用了国际顶尖的全程语音TTS技术，能进行整段英文的流利朗读，并能自由调节朗读的速度与频率等。那么，这个神奇的TTS究竟是什么东西呢？ 其实，TTS是微软出品的一套文字朗读引擎（Text-To-Speech Engine)，这些英语软件就是调用它来进行英文朗读的。我们在英语学习软件的编程开发中也可使用TTS技术，下面笔者将利用Visual Basic 5.0来揭开TTS神秘的面纱。 一、安装TTS引擎 TTS引擎所需的Microsoft Text-to-Speech Engine与Microsoft Speech API软件都可到微软的站点去下载，也可以在“金山词霸2000”或“金山词霸.net”的安装光盘上找到（文件名为MSTTS.EXE与SPCHAPI.EXE)。安装了TTS引擎后，在Windows所在目录下会生成一个SPEECH目录，其中有一个Vtxtauto.tlb文件，在编程时我们需要调用它。 二、在VB中引入Vtxtauto.tlb文件 进入VB 5.0，执行选单命令“文件/新建工程/标准EXE”并确定，然后执行选单“工程”中的“引用”，单击“浏览”按钮到Windows目录下的SPEECH子目录，打开Vtxtauto.tlb文件，将“VoiceText 1.0 Type Library”添加到引用列表中，选中它并单击确定。将库Vtxtauto引入VB后，我们可以通过选单“视图”中的“对象浏览器”来了解它所封装的类，以及各类成员函数的属性的意义、使用格式等信息。一些主要的方法与属性意义,笔者在下面的源程序中将给出注释，在这里就不详细列出。
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安装了sdk后应该可以在控件箱单击鼠标右键，然后选择部件，在弹出的列表中应该可以找到microsoft tts engine或之类的东西，选择后就可以吧tts engine作为控件放到窗体上。 调用貌似是用.speak(String)实现的。 由于我是很久以前用的，所以也记得不是很清楚了，你可以找找看。
用 CType(TTS_View1.Rows.Item(i).Cells(j).Controls(1), CheckBox).Checked 判断
If CType(TTS_View1.Rows.Item(i).Cells(j).Controls(1), CheckBox).Checked = True Then
else
end if
Public Class ks
Inherits System.Windows.Forms.Form
#Region " Windows 窗体设计器生成的代码 "
Public Sub New()
MyBase.New()
'该调用是 Windows 窗体设计器所必需的。
InitializeComponent()
'在 InitializeComponent() 调用之后添加任何初始化
End Sub
'窗体重写 dispose 以清理组件列表。
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Windows 窗体设计器所必需的
Private components As System.ComponentModel.IContainer
'注意: 以下过程是 Windows 窗体设计器所必需的
'可以使用 Windows 窗体设计器修改此过程。
'不要使用代码编辑器修改它。
Friend WithEvents tx As System.Windows.Forms.TextBox
Friend WithEvents ty As System.Windows.Forms.TextBox
Friend WithEvents tz As System.Windows.Forms.TextBox
Friend WithEvents ok As System.Windows.Forms.Button
Friend WithEvents l1 As System.Windows.Forms.Label
Friend WithEvents l2 As System.Windows.Forms.Label
Friend WithEvents l3 As System.Windows.Forms.Label
System.Diagnostics.DebuggerStepThrough() Private Sub InitializeComponent()
Me.l1 = New System.Windows.Forms.Label
Me.l2 = New System.Windows.Forms.Label
Me.l3 = New System.Windows.Forms.Label
Me.tx = New System.Windows.Forms.TextBox
Me.ty = New System.Windows.Forms.TextBox
Me.tz = New System.Windows.Forms.TextBox
Me.ok = New System.Windows.Forms.Button
Me.SuspendLayout()
'
'l1
'
Me.l1.BackColor = System.Drawing.Color.FromArgb(CType(192, Byte), CType(192, Byte), CType(255, Byte))
Me.l1.Location = New System.Drawing.Point(8, 8)
Me.l1.Name = "l1"
Me.l1.Size = New System.Drawing.Size(200, 16)
Me.l1.TabIndex = 0
'
'l2
'
Me.l2.BackColor = System.Drawing.Color.FromArgb(CType(192, Byte), CType(192, Byte), CType(255, Byte))
Me.l2.Location = New System.Drawing.Point(8, 32)
Me.l2.Name = "l2"
Me.l2.Size = New System.Drawing.Size(200, 16)
Me.l2.TabIndex = 1
'
'l3
'
Me.l3.BackColor = System.Drawing.Color.FromArgb(CType(192, Byte), CType(192, Byte), CType(255, Byte))
Me.l3.Location = New System.Drawing.Point(8, 56)
Me.l3.Name = "l3"
Me.l3.Size = New System.Drawing.Size(200, 16)
Me.l3.TabIndex = 2
'
'tx
'
Me.tx.Location = New System.Drawing.Point(8, 80)
Me.tx.Name = "tx"
Me.tx.Size = New System.Drawing.Size(200, 25)
Me.tx.TabIndex = 3
Me.tx.Text = "请输入x"
'
'ty
'
Me.ty.Location = New System.Drawing.Point(8, 104)
Me.ty.Name = "ty"
Me.ty.Size = New System.Drawing.Size(200, 25)
Me.ty.TabIndex = 4
Me.ty.Text = "请输入y"
'
'tz
'
Me.tz.Location = New System.Drawing.Point(8, 128)
Me.tz.Name = "tz"
Me.tz.Size = New System.Drawing.Size(200, 25)
Me.tz.TabIndex = 5
Me.tz.Text = "请输入z"
'
'ok
'
Me.ok.BackColor = System.Drawing.Color.FromArgb(CType(192, Byte), CType(192, Byte), CType(255, Byte))
Me.ok.Location = New System.Drawing.Point(8, 160)
Me.ok.Name = "ok"
Me.ok.Size = New System.Drawing.Size(200, 64)
Me.ok.TabIndex = 6
Me.ok.Text = "ok"
'
'ks
'
Me.AutoScaleBaseSize = New System.Drawing.Size(8, 18)
Me.BackColor = System.Drawing.Color.FromArgb(CType(128, Byte), CType(128, Byte), CType(255, Byte))
Me.ClientSize = New System.Drawing.Size(216, 232)
Me.Controls.Add(Me.ok)
Me.Controls.Add(Me.tz)
Me.Controls.Add(Me.ty)
Me.Controls.Add(Me.tx)
Me.Controls.Add(Me.l3)
Me.Controls.Add(Me.l2)
Me.Controls.Add(Me.l1)
Me.Name = "ks"
Me.Text = "考试"
Me.ResumeLayout(False)
End Sub
#End Region
Dim x, y, z, a, b, c, d, aa, bb, cc As Single
Dim tts, alls As Single
Private Sub ks_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
x = Int(1 + 30 * Rnd())
y = Int(1 + 20 * Rnd())
z = Int(1 + 25 * Rnd())
a = Int(2 + 4 * Rnd())
b = Int(1 + a * 2 * Rnd())
c = Int(1 + b * 2 * Rnd())
d = Int(1 + c * 3 * Rnd())
aa = x + y + z
bb = a * x + b * y + c * z
cc = b * x + c * y + d * z
l1.Text = "x+y+z=" Str(aa)
l2.Text = Str(a) "x+" Str(b) "y+" Str(c) "z=" Str(bb)
l3.Text = Str(b) "x+" Str(c) "y+" Str(d) "z=" Str(cc)
End Sub
Private Sub ok_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ok.Click
If Val(tx.Text) = x And Val(ty.Text) = y And Val(tz.Text) = z Then
tts = tts + 1
End If
alls = alls + 1
tx.Text = ""
ty.Text = ""
tz.Text = ""
x = Int(1 + (1000 ^ 0.5) * Rnd())
y = Int(1 + (10000 ^ 0.4) * Rnd())
z = Int(1 + (100000 ^ 0.3) * Rnd())
a = Int(2 + 4 * Rnd())
b = Int(1 + a * 2 * Rnd())
c = Int(1 + b * 2 * Rnd())
d = Int(1 + c * 3 * Rnd())
aa = x + y + z
bb = a * x + b * y + c * z
cc = b * x + c * y + d * z
l1.Text = "x+y+z=" Str(aa)
l2.Text = Str(a) "x+" Str(b) "y+" Str(c) "z=" Str(bb)
l3.Text = Str(b) "x+" Str(c) "y+" Str(d) "z=" Str(cc)
End Sub
Private Sub ks_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Click
Dim lv As Single
If Not (alls = 0) Then
lv = Int(tts * 100000 / alls) / 1000
MsgBox(Str(lv) "%", , "正确率")
tx.Visible = False
ty.Visible = False
tz.Visible = False
ok.Visible = False
l1.Visible = False
l2.Visible = False
l3.Visible = False
Else
MsgBox("答题!", , "答题!")
End If
End Sub
End Class