Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class RegionMakeEmptyMakeInfinite
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
public class Form1
Inherits System.Windows.Forms.Form
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
Dim g As Graphics = Me.CreateGraphics()
g.Clear(Me.BackColor)
Dim rect1 As New Rectangle(20, 20, 60, 80)
Dim rect2 As New Rectangle(50, 30, 60, 80)
Dim rgn1 As New [Region](rect1)
Dim rgn2 As New [Region](rect2)
If Not rgn1.IsEmpty(g) Then
rgn1.MakeEmpty()
End If
If Not rgn2.IsInfinite(g) Then
rgn2.MakeInfinite()
End If ' Get bounds of the infinite region
Dim rect As RectangleF = rgn2.GetBounds(g)
Console.WriteLine(rect.ToString())
g.FillRegion(Brushes.Red, rgn2)
g.Dispose()
End Sub
Public Sub New()
MyBase.New()
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
End Sub
End Class