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
Prirate Sub Form_KeyDown(KeyCode As Integer,Shift As Integer)
 str2=str2&Chr(KeyCode)
End Sub
Private Sub Command1_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