VB编程：Timer控件实例幼儿识字卡片

运行效果：

程序代码：

Dim myarray(10) As String     '定义全局变量，文字数组
Dim i As Integer

Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)
    If KeyCode = 37 Then          '键盘按键左边←
        Call Image1_Click
    ElseIf KeyCode = 39 Then      '键盘按键右边→
        Call Image2_Click
    End If
End Sub

Private Sub Form_Load()     '定义文字数组，初始化timer控件、索引值i
    Timer1.Enabled = fasle
    Timer1.Interval = 100
    myarray(0) = "大": myarray(1) = "小": myarray(2) = "多": myarray(3) = "少"
    myarray(4) = "前": myarray(5) = "后": myarray(6) = "左": myarray(7) = "右"
    myarray(8) = "中": myarray(9) = "上": myarray(10) = "下"
    Label1.Left = -3800
    i = -1
    Call Image2_Click
End Sub

Private Sub Image1_Click()   '移动到上一个字
    If i > 0 Then
        i = i - 1
        Label1 = myarray(i)
    End If
    Timer1.Enabled = True
    Label1.Left = -4000
End Sub

Private Sub Image2_Click()   '移动到下一个字
    If i < 10 Then
        i = i + 1
        Label1 = myarray(i)
    End If
    Timer1.Enabled = True
    Label1.Left = -4000
End Sub

Private Sub Image2_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Image1.MousePointer = 99
    Image1.MouseIcon = LoadPicture("c:\windows\cursors\harrow.cur")
End Sub

Private Sub Image3_Click()
    Me.WindowState = vbMinimized    '最小化窗口，需要把showintaskbar属性设置为true
End Sub

Private Sub Image3_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Image3.MousePointer = 99
    Image3.MouseIcon = LoadPicture("c:\windows\cursors\harrow.cur")
End Sub

Private Sub Image4_Click()
    End
End Sub

Private Sub Image4_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Image4.MousePointer = 99
    Image4.MouseIcon = LoadPicture("c:\windows\cursors\harrow.cur")
End Sub

'Timer控件实现文字移动效果，如果移动到中间位置就停止。
Private Sub Timer1_Timer()
    If Label1.Left < 5000 Then
        Label1.Left = Label1.Left + 200
    Else
        Label1.Left = -4000
    End If
    If Label1.Left > 1560 And Label1.Left < 1660 Then
        Timer1.Enabled = False
    End If
End Sub

学习总结：

1、harrow.cur为windowsXP的系统图标，windows7中没有，要在win7中运行则需要修改成其他图标，否则报错。

2、方向键的键盘码keycode如下：

keycode37=Left←

keycode38=Up↑

keycode39=Right→

keycode40=Down↓

3、如果使用if...else语句，else遵循就近原则。