contoh no 1 di balik

Public Class Form1

        Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
            Me.AutoSize = True : Me.Text = "Graph by Your ID"
            PictureBox1.Top = 0 : PictureBox1.Left = 0
            PictureBox1.Width = 500 : PictureBox1.Height = 500
            Button1.Text = "Draw" : Button1.Font = New Font("Courier", 20)
            Button1.Width = 115 : Button1.Height = 50
            Button1.Top = 10 : Button1.Left = PictureBox1.Width + 50
        End Sub

        Private Sub Button1_Click(sender As Object, e As System.EventArgs) Handles Button1.Click
            Dim myGraph As Graphics = PictureBox1.CreateGraphics
            Dim myPen1, myPen2 As Pen
        Dim id, x1, y1, x2, y2, width, height As Integer
            Dim mybrush As Brush

            myPen1 = New Pen(Color.Blue, 6)
            myPen2 = New Pen(Color.DarkMagenta, 3)
            mybrush = New SolidBrush(Color.DarkMagenta)
            myGraph.DrawRectangle(myPen1, 0, 0, 500, 500)
            For id = 1 To 9
                x1 = id * 50 : y1 = (id - 1) * 50
            x2 = x1 : y2 = y1 + 50
            width = 500 - x1
                Height = 50

                myGraph.DrawRectangle(myPen2, x1, y1, Width, Height)
                myGraph.FillRectangle(mybrush, x1, y1, Width, Height)

            Next

        End Sub
    End Class