Painting under a control

[Bob Hollness]

Hi all.

I have given up trying to make my textboxes transparent. It can't be done
(AFAIK!) So now, I am going to try to paint under the textbox the part of
the screen that is covered by it. My (possible) problem is that the
textboxes are sitting on top of images, and also, I have no idea where to
start!

So, is there anybody here that can help or has done this already and is
willing to share the code?

Thanks,
Bob

 

[Guest]

A solution which has a little issue: The cursor in the control is slightly
misplaced.

Imports System.Windows.Forms

Public Class TransparentTextBox
Inherits System.Windows.Forms.TextBox

#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.Opaque, False)
Me.SetStyle(ControlStyles.SupportsTransparentBackColor, True)
Me.SetStyle(ControlStyles.UserPaint, True)
Me.BackColor = System.Drawing.Color.Transparent
End Sub

'UserControl 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.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
components = New System.ComponentModel.Container
End Sub

#End Region

Protected Overrides Sub OnPaintBackground(ByVal pevent As
System.Windows.Forms.PaintEventArgs)
Me.SetStyle(ControlStyles.SupportsTransparentBackColor, True)
Me.BackColor = System.Drawing.Color.Transparent
MyBase.OnPaintBackground(pevent)
End Sub

Protected Overrides Sub OnPaint(ByVal e As
System.Windows.Forms.PaintEventArgs)
MyBase.OnPaint(e)
e.Graphics.DrawString(Me.Text, Me.Font, New
System.Drawing.SolidBrush(Me.ForeColor), New
System.Drawing.PointF(e.ClipRectangle.X, e.ClipRectangle.Y))
End Sub

Protected Overrides Sub OnTextChanged(ByVal e As System.EventArgs)
MyBase.OnTextChanged(e)
Me.Invalidate()
End Sub

Protected Overrides Sub OnEnter(ByVal e As System.EventArgs)
MyBase.OnEnter(e)
Me.Invalidate()
End Sub
End Class