Mega Code Archive
Mouse drag and draw
<![CDATA[
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class MouseDrawLine
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
Public Class Form1
Inherits System.Windows.Forms.Form
Public Sub New()
MyBase.New()
InitializeComponent()
End Sub
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
Private components As System.ComponentModel.IContainer
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 266)
End Sub
Dim g As System.Drawing.Graphics
Dim x1, y1, x2, y2 As Integer
Dim pen1 As New System.Drawing.Pen(Color.Black)
Dim mouseDown As Integer = 0
Private Sub Form1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseDown
mouseDown = 1
x1 = e.X
y1 = e.Y
End Sub
Private Sub Form1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseUp
mouseDown = 0
End Sub
Private Sub Form1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseMove
If mouseDown = 0 Then
Exit Sub
Else
x2 = e.X
y2 = e.Y
g = Me.CreateGraphics
g.DrawLine(pen1, x1, y1, x2, y2)
x1 = x2
y1 = y2
End If
End Sub
End Class
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