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