Imports System
Imports System.Drawing
Imports System.Collections
Imports System.ComponentModel
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
Imports System.Data
Imports System.Configuration
Imports System.Resources
Public Class TransparentForm
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
Me.SetStyle(ControlStyles.ResizeRedraw, True)
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
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(208, 68)
Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None
Me.Name = "TransparentForm"
Me.Text = "Transparency Test"
End Sub
#End Region
Private Sub TransparentForm_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
Dim g As Graphics = e.Graphics
Dim _pen As Pen = New Pen(Color.DarkBlue, 4)
Dim rect As Rectangle = Me.ClientRectangle
rect.Inflate(-2, -2)
g.FillEllipse(Brushes.Yellow, rect)
g.DrawEllipse(_pen, rect)
_pen.Dispose()
Dim _font As Font = New Font(Me.Font, FontStyle.Bold)
Dim format As StringFormat = New StringFormat()
format.Alignment = StringAlignment.Center
format.LineAlignment = StringAlignment.Center
g.DrawString("Window", _font, Brushes.DarkBlue, RectangleF.op_Implicit(Me.ClientRectangle), format)
_font.Dispose()
End Sub
Sub SetEllipseRegion()
Dim rect As Rectangle = Me.ClientRectangle
Dim path As GraphicsPath = New GraphicsPath()
path.AddEllipse(RectangleF.op_Implicit(rect))
Me.Region = New Region(path)
path.Dispose()
End Sub
Private Sub TransparentForm_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
SetEllipseRegion()
End Sub
Private Sub TransparentForm_SizeChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.SizeChanged
SetEllipseRegion()
End Sub
End Class
Public Class MainClass
Shared Sub Main()
Dim myform As Form = New TransparentForm()
Application.Run(myform)
End Sub
End Class
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