单项选择题

在窗体上画一个命令按钮Command1和两个文本框,名称分别为Text1和Text2。编写如下两个事件过程:

Dim Str1 As String,str2 As String

Private Sub form_load()

Text1.Text=""

Text2.Text=""

Text1.Enabled=False

Text2.Enabled=False

End Sub

Private Sub Form_KeyPress(KeyAscii As Integer)

str1=str1 & Chr(KeyAscii)

End Sub

Private Sub Form_KeyDown(KeyCode As Integer,Shift As Integer)

str2=str2 & Chr(KeyCode)

End Sub

Private SubCommand1_Click()

Text1.Text=str1

Text2.Text=str2

str1=""

str2=""

End Sub

当在设计阶段的窗体的KeyPreview属性设置为True时,程序运行过程中,在键盘上输入小写字母abc,然后单击命令按钮,则文本框Text1中显示的内容为

A.abc
B.不显示任何信息
C.ABC
D.出错