在窗体中添加两个文本框，其名称为别为Text1和Text2；两个标签，其名称为别为Labe11和Labe12。编写程序，使得程序运行后，在文本框Text2中输入小写字母，能转换为比此字母ASCII代码小4的大写字母，结果显示在文本框Text1中。如输入“efg”，则输出结果为“ABC”，运行后如下。能够实现上述功能的程序是______。

A．Private Sub Form Load( )
Show
Text1.Text=""
Text2.Text=""
Text2.SetFocus
End Sub
Private Sub Text2_KeyDown(KeyCode As
Integer, Shift As Integer)
Text1.Text=Chr(KeyCode-4)
End Sub

B．Private Sub Form Load( )
Show
Text1.Text=""
Text2.Text=""
Text2.SetFocus
End Sub
Private Sub Text2_KeyDown(KeyCode As Integer, Shift As Integer)
Text1.Text=Text1.Text+Chr
(KeyCode-4)
End Sub

C．Private Sub Form_Load( )
Show
Text1.Text=""
Text2.Text=""
Text2.SetFocus
End Sub
Private Sub Text2_Click(Keycode As Integet，Shift As Integer)
Text1.Text=Text1.Text+Chr(KeyCode-4)
End Sub

D．Private Sub Form_Load( )
Show
Text1.Text=""
Text2.Text=""
Text2.SetFocus
End Sub
Private Sub Text2_Click(KeyCode As Integer，Shift As Integer)
Text1.Text=Chr(KeyCode-4)
End Sub