问题 单项选择题

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 Integer)
  If KeyAscii<65 Or KeyAscii>90 Then
   MsgBox"请输入大写字母"
   KeyAscii=0
  End If
 End Sub

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

C.Private Sub Text1_MouseDown(Button As Integer,Shift As Integer,X As Single,Y As Single)
If Asc(Text1.Text)<65 Or Asc(Text1.Text)>90 Then
  MsgBox"请输入大写字母"
 End If
End Sub

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

答案

参考答案:A

不定项选择
单项选择题