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
参考答案:A