更改發件人TextBox的backColor

Question

我有很多的文本框，我希望他們在重點時更改backColor。

這是代碼，當負載形式

Public Sub New() 
    Me.InitializeComponent() 
    For Each c As Control In Me.Controls 
     If TypeOf c Is TextBox Then 
      AddHandler c.Enter, AddressOf Me.changeBg 
      AddHandler c.Leave, AddressOf Me.restoreBg 
     End If 
    Next 
End Sub 

這聽者

Sub changeBg(sender As Object, e As EventArgs) 
    'Dim c As Control = sender 
    'sender.BackColor = System.Drawing.ColorTranslator.FromOle(&HFFFF9D) 
End Sub 

如何獲得TextBox控件並更改其背景色？因爲我得到的發送者爲對象

Answer 1

我終於添加了一個正確的鑄件VB

Dim tb As TextBox = DirectCast(sender, TextBox) 
tb.BackColor = System.Drawing.ColorTranslator.FromOle(&HFFFF9D) 

因爲它做在這裏

演員事件發送者控制http://www.java2s.com/Tutorial/VB/0260__GUI/Casteventsendertocontrol.htm

這裏 Casting in visual basic?