Setting a DateTimePicker Control’s Background Color

The datetimepicker control contained in the .NET Framework 1.0 and 1.1 does not support setting its background color. The class below inherits from System.Windows.Forms.DateTimePicker and extends it by a working BackColor property:

Imports System
Imports System.ComponentModel
Imports System.Drawing
Imports System.Windows.Forms

Public Class ExtendedDateTimePicker
    Inherits DateTimePicker

    Private m_BackBrush As SolidBrush

    < _
        Browsable(True), _
        DesignerSerializationVisibility( _
            DesignerSerializationVisibility.Visible _
        ) _
    > _
    Public Overrides Property BackColor() As Color
            Return MyBase.BackColor
        End Get
        Set(ByVal Value As Color)
            If Not m_BackBrush Is Nothing Then
            End If
            MyBase.BackColor = Value
            m_BackBrush = New SolidBrush(Me.BackColor)
        End Set
    End Property

    Protected Overrides Sub WndProc(ByRef m As Message)
        Const WM_ERASEBKGND As Int32 = &H14
        If m.Msg = WM_ERASEBKGND Then
            Using g As Graphics = Graphics.FromHdc(m.WParam)
                If m_BackBrush Is Nothing Then
                    m_BackBrush = New SolidBrush(Me.BackColor)
                End If
                g.FillRectangle(m_BackBrush, Me.ClientRectangle)
            End Using
        End If
    End Sub

    Protected Overloads Overrides Sub Dispose( _
        ByVal disposing As Boolean _
        If disposing AndAlso Not m_BackBrush Is Nothing Then
        End If
    End Sub
End Class