' Project Scribble

' Capture the coordinates of MouseMove events and store
' e.X and e.Y in ArrayList objects so that the mouse movements
' can be recreated in the Paint event handler.<p>

Public Class Form1
    Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    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

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents PictureBox1 As System.Windows.Forms.PictureBox
    Friend WithEvents btnReset As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.PictureBox1 = New System.Windows.Forms.PictureBox
        Me.btnReset = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'PictureBox1
        '
        Me.PictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
        Me.PictureBox1.Location = New System.Drawing.Point(48, 56)
        Me.PictureBox1.Name = "PictureBox1"
        Me.PictureBox1.Size = New System.Drawing.Size(200, 192)
        Me.PictureBox1.TabIndex = 0
        Me.PictureBox1.TabStop = False
        '
        'btnReset
        '
        Me.btnReset.Font = New System.Drawing.Font("Microsoft Sans Serif", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.btnReset.Location = New System.Drawing.Point(80, 8)
        Me.btnReset.Name = "btnReset"
        Me.btnReset.Size = New System.Drawing.Size(136, 32)
        Me.btnReset.TabIndex = 1
        Me.btnReset.Text = "Reset"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Controls.Add(Me.btnReset)
        Me.Controls.Add(Me.PictureBox1)
        Me.Name = "Form1"
        Me.Text = "Scribble Project"
        Me.ResumeLayout(False)

    End Sub

#End Region
    Private x, y As ArrayList

    Private Sub PictureBox1_MouseMove(ByVal sender As Object, _
        ByVal e As System.Windows.Forms.MouseEventArgs) _
        Handles PictureBox1.MouseMove

        If e.Button = MouseButtons.Left Then
            x.Add(e.X)
            y.Add(e.Y)
            PictureBox1.Invalidate()
        End If
    End Sub

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

        x = New ArrayList
        y = New ArrayList
    End Sub

    Private Sub PictureBox1_Paint(ByVal sender As Object, _
        ByVal e As System.Windows.Forms.PaintEventArgs) _
        Handles PictureBox1.Paint

        Dim i As Integer
        Dim g As Graphics = e.Graphics
        Dim p As New Pen(Color.Red, 4)

        For i = 1 To x.Count - 1
            g.DrawLine(p, x(i - 1), y(i - 1), x(i), y(i))
        Next
    End Sub

    Private Sub btnReset_Click(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles btnReset.Click
        x.Clear()
        y.Clear()
        PictureBox1.Invalidate()
    End Sub
End Class