在窗体上画一个名称为Text1的文本框，要求文本框只能接收大写字母的输入。以下能实现该操作的事件过程是 ______。

A．Private Sub Text1_KeyPress(KeyAscii As IntegeIfKeyAscii＜65 Or KeyAscii＞90 Then MsgBox“请输入大写字母” KeyAscii=0End If End Sub

B．Private Sub Text1_KeyDown(KeyCode As Integer，Shift As IntegeIf KeyCode＜65 Or KeyCode＞90 Then MsgBox“请输入大写字母” KeyCode=0End If End Sub

C．Private Sub Text1 MouseDown(Button As Integer，Shift As Integer，X As Single，Y As Singl， If Asc(Text1.Tex＜65 Or Asc(Text1.Tex＞90 Then MsgBox“请输入大写字母” End If End Sub

D．Private Sub Text1_Change()If Asc(Text1.Tex＞64 And Asc(Text1.Tex＜91 Then MsgBox“请输入大写字母”End If End Sub