Aggiungere colore di sfondo alla DateTimePicker
March 31, 09 by DeliveryDi Default la classe DateTimePicker non ha il metodo BackColor. Qualora dovessere diventare indispensabile nei vostri progetti ecco la classe che lo implementa:
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
Get
Return MyBase.BackColor
End Get
Set(ByVal Value As Color)
If Not m_BackBrush Is Nothing Then
m_BackBrush.Dispose()
End If
MyBase.BackColor = Value
m_BackBrush = New SolidBrush(Me.BackColor)
Me.Invalidate()
End Set
End Property
Protected Overrides Sub WndProc(ByRef m As Message)
Const WM_ERASEBKGND As Int32 = &H14
If m.Msg = WM_ERASEBKGND Then
Dim 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)
g.Dispose()
Else
MyBase.WndProc(m)
End If
End Sub
Protected Overloads Overrides Sub Dispose( _
ByVal disposing As Boolean _
)
If disposing AndAlso Not m_BackBrush Is Nothing Then
m_BackBrush.Dispose()
End If
MyBase.Dispose(disposing)
End Sub
End Class
Un solo piccolissimo problema: non funziona con lo style di Windows Vista. 
, vb.net , visual studio 
