Public Class Form1
    Inherits System.Windows.Forms.Form

#Region " Windows 窗體設計器生成的代碼 "

    Public Sub New()
        MyBase.New()

        '該調用是 Windows 窗體設計器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 調用之后添加任何初始化

    End Sub

    '窗體重寫 dispose 以清理組件列表。
    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 窗體設計器所必需的
    Private components As System.ComponentModel.IContainer

    '注意: 以下過程是 Windows 窗體設計器所必需的
    '可以使用 Windows 窗體設計器修改此過程。
    '不要使用代碼編輯器修改它。
    Friend WithEvents MainMenu1 As System.Windows.Forms.MainMenu
    Friend WithEvents MenuItem1 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem2 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem3 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem4 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuExt As System.Windows.Forms.MenuItem
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(Form1))
        Me.MainMenu1 = New System.Windows.Forms.MainMenu
        Me.MenuItem1 = New System.Windows.Forms.MenuItem
        Me.MenuItem2 = New System.Windows.Forms.MenuItem
        Me.MenuItem3 = New System.Windows.Forms.MenuItem
        Me.MenuItem4 = New System.Windows.Forms.MenuItem
        Me.MenuExt = New System.Windows.Forms.MenuItem
        '
        'MainMenu1
        '
        Me.MainMenu1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.MenuItem1})
        '
        'MenuItem1
        '
        Me.MenuItem1.Index = 0
        Me.MenuItem1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.MenuItem2, Me.MenuItem3, Me.MenuItem4, Me.MenuExt})
        Me.MenuItem1.Text = "操作"
        '
        'MenuItem2
        '
        Me.MenuItem2.Index = 0
        Me.MenuItem2.Text = "異形窗體"
        '
        'MenuItem3
        '
        Me.MenuItem3.Index = 1
        Me.MenuItem3.Text = "標準窗體"
        '
        'MenuItem4
        '
        Me.MenuItem4.Index = 2
        Me.MenuItem4.Text = "-"
        '
        'MenuExt
        '
        Me.MenuExt.Index = 3
        Me.MenuExt.Text = "退出"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackgroundImage = CType(resources.GetObject("$this.BackgroundImage"), System.Drawing.Image)
        Me.ClientSize = New System.Drawing.Size(592, 353)
        Me.Menu = Me.MainMenu1
        Me.Name = "Form1"
        Me.Text = "異形窗體"

    End Sub

#End Region

    Private Sub MenuItem2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem2.Click
        Dim P1, P2, P3, P4, P5, myhwnd, tcms, Part As Integer
        '創建最大的矩形區域
        P1 = CreateRectRgn(0, 0, 600, 400)
        '創建將要減去的兩個圓形區域
        P2 = CreateEllipticRgn(150, 115, 250, 180)
        P3 = CreateEllipticRgn(330, 115, 430, 180)
        '創建將要減去的矩形區域
        P4 = CreateRectRgn(220, 250, 350, 300)

        myhwnd = GetActiveWindow()
        '取得窗口的句柄
        Part = CombineRgn(P1, P1, P2, RGN_DIFF)
        Part = CombineRgn(P1, P1, P3, RGN_DIFF)
        Part = CombineRgn(P1, P1, P4, RGN_DIFF)
        '進行區域合并
        Call SetWindowRgn(myhwnd, P1, True)
        '設置窗口形狀
    End Sub

    Private Sub MenuExt_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuExt.Click
        Close()
    End Sub

    Private Sub MenuItem3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem3.Click
        Dim P1, myhwnd As Integer
        P1 = CreateRectRgn(0, 0, 600, 400)
        myhwnd = GetActiveWindow()
        '取得窗口的句柄
        Call SetWindowRgn(myhwnd, P1, True)
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub
End Class