题目内容
(请给出正确答案)
[主观题]
在窗体上画一个命令按钮和两个文本框,其名称分别为Command1、Text1和Text2,在属性窗口中把窗体的K
eyPreview属性设置为True,然后编写如下程序: Diln S1 As String,S2 As String Private Sub Form. Load() Text1.Text="" Text2.Text="" Text1.Enabled=False Text2.Enabled=False End Sub Private Sub Form. KeyDown(KeyCode As Integer,Shift As Integer) S2=S2&Chr(KeyCode) End Sub Pri vate Sub Form. KeyPress(KeyAscii As Integer) S1=S1&Chr(KeyAscii) End Sub Private Sub Command1 Click() Text1.Text=S1 Text2.Text=S2 S1="" S2="" End Sub 程序运行后,先后按“a”、“b”、“c”键,然后单击命令按钮,在文本框Text1和Text2中显示的内容分别为()。
A.abc和ABC
B.空白
C.ABC和abc
D.出错
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