如题，网上找了好多答案，C#的自己变成VB

还有国际友人的C#代码，就是不知道哪里不对，死活就是底色没法改变

大体逻辑如下：

Winform修改DateTimePicker控件的背景色Winform中日期控件DateTimePicker默认是不能修改背景色的，如果想要改变它的背景色那也是有办法的，只需要继承DateTimePicker做一个自定义控件，再重写WndProc方法。此外还要重写BackColor属性，这样就可以在外部修改它的颜色了。

我的代码如下

Imports System.ComponentModel

<ToolboxBitmap(GetType(DateTimePicker))>
Public Class DatePicker02
Inherits DateTimePicker
Public Sub New()
'InitializeComponent()
End Sub

Public Sub New(container As IContainer)
'InitializeComponent()
container.Add(Me)
End Sub

Private Const WM_ERASEBKGND As Int32 = &H14
Private _backColor As Color

<Browsable(True)>
<Description("控件背景颜色"), Category("外观")>
Public Shadows Property BackColor As Color
Get
Return _backColor
End Get
Set(ByVal value As Color)
_backColor = value
End Set
End Property

Protected Shadows Sub WndProc(m As System.Windows.Forms.Message)
MyBase.WndProc(m)
If m.Msg = WM_ERASEBKGND Then
Dim g As Graphics = Graphics.FromHdc(m.WParam)
g.FillRectangle(New SolidBrush(_backColor), ClientRectangle)
g.Dispose()
End If
End Sub
End Class