form1.vb

苏金明编写的《用VB.NET和VC#.NET开发交互式CAD系统》一书的源代码

Public Class Form1
    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

    '窗体重写处置以清理组件列表。
    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 TextBox1 As System.Windows.Forms.TextBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.TextBox1 = New System.Windows.Forms.TextBox()
        Me.SuspendLayout()
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(24, 248)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical
        Me.TextBox1.Size = New System.Drawing.Size(360, 21)
        Me.TextBox1.TabIndex = 1
        Me.TextBox1.Text = ""
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(424, 286)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.TextBox1})
        Me.Name = "Form1"
        Me.Text = "鼠标事件测试"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
        Dim g As Graphics = e.Graphics
        Dim pen As New Pen(Color.Blue, 3)
        g.DrawRectangle(pen, 100, 20, 200, 200)
    End Sub

    Protected Overrides Sub OnMouseMove(ByVal e As MouseEventArgs)
        TextBox1.Text = " "
        If InBox(e.X, e.Y) Then
            TextBox1.Text = "当前鼠标在方框内移动。"
        Else
            TextBox1.Text = "当前鼠标在方框外移动。"
        End If
    End Sub

    Protected Overrides Sub OnMouseDown(ByVal e As MouseEventArgs)
        If InBox(e.X, e.Y) Then
            TextBox1.Text = " "
            If e.Button = MouseButtons.Left Then
                TextBox1.Text = "当前鼠标左键在方框内按下。"
            ElseIf e.Button = MouseButtons.Right Then
                TextBox1.Text = "当前鼠标右键在方框内按下。"
            End If
        End If
    End Sub

    Private Function InBox(ByVal x As Single, ByVal y As Single) As Boolean
        If x > 100 And x < 300 And y > 20 And y < 220 Then
            Return True
        Else
            Return False
        End If
    End Function

End Class