form.vb

Visual.Basic.NET实用编程百例-47.6M.zip

Public Class Formpolygon
    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 Label1 As System.Windows.Forms.Label
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label1 = New System.Windows.Forms.Label
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.Button1 = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.BackColor = System.Drawing.Color.Transparent
        Me.Label1.Location = New System.Drawing.Point(16, 24)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(100, 24)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "输入边数"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(88, 16)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(72, 21)
        Me.TextBox1.TabIndex = 1
        Me.TextBox1.Text = "3"
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(176, 16)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(75, 25)
        Me.Button1.TabIndex = 2
        Me.Button1.Text = "生成多边形"
        '
        'Formpolygon
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(492, 473)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Label1)
        Me.Name = "Formpolygon"
        Me.Text = "任意多边形窗体"
        Me.ResumeLayout(False)

    End Sub

#End Region
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim i, FormPoly, num, myhwnd As Integer
        num = CInt(Me.TextBox1.Text)
        '将多边形的边数存入变量num
        Dim PolyPoint(num) As POINTAPI
        For i = 0 To num - 1 Step 1
            PolyPoint(i).x = CInt(Int(Rnd() * 500) + 1)
            PolyPoint(i).y = CInt(Int(Rnd() * 500) + 1)
        Next
        '为多边形各点坐标随机赋值
        FormPoly = CreatePolygonRgn(PolyPoint(0), num, 1)
        myhwnd = GetActiveWindow()
        SetWindowRgn(myhwnd, FormPoly, True)
    End Sub


    Private Sub formPolygon_MouseDown(ByVal sender As Object, _
                                ByVal e As System.Windows.Forms.MouseEventArgs) _
                                Handles MyBase.MouseDown
        ReleaseCapture()
        SendMessage(Me.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0)
    End Sub

    Private Sub Formpolygon_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub
End Class