form1.vb

Source code for VB.NET book - Chapter 4

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 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 Panel1 As System.Windows.Forms.Panel
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Panel1 = New System.Windows.Forms.Panel
        Me.SuspendLayout()
        '
        'Panel1
        '
        Me.Panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.Panel1.Dock = System.Windows.Forms.DockStyle.Fill
        Me.Panel1.Location = New System.Drawing.Point(0, 0)
        Me.Panel1.Name = "Panel1"
        Me.Panel1.Size = New System.Drawing.Size(292, 266)
        Me.Panel1.TabIndex = 0
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Controls.Add(Me.Panel1)
        Me.Name = "Form1"
        Me.Text = "百叶窗"
        Me.ResumeLayout(False)

    End Sub

#End Region
    Dim h, w As Integer
    Dim g As Image
    Dim pic1, pic2 As Bitmap
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim g1 As Bitmap
        h = Panel1.Height
        w = Panel1.Width
        g = Image.FromFile("sunset.jpg")
        g1 = New Bitmap(g, w, h)
        Panel1.BackgroundImage = g1
    End Sub

    Private Sub Panel1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Panel1.Paint
        Dim g2 As Graphics = e.Graphics
        Dim col As Color = New Color
        Dim i, j, k As Integer
        Panel1.BackgroundImage = Nothing
        pic1 = New Bitmap(g, w, h)
        pic2 = New Bitmap(w, h)
        For i = 0 To 8
            For j = i To h - 1 Step 10
                For k = 0 To w - 1
                    col = pic1.GetPixel(k, j)
                    pic2.SetPixel(k, j, col)
                Next
            Next
            g2.DrawImage(pic2, 0, 0)
            zhanting()
        Next
    End Sub
    Private Sub zhanting()
        Dim i As Integer
        For i = 0 To 100000000
            If i < 100000000 Then
            End If
        Next
    End Sub
End Class