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=FalseText2.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 Sub Command1_Click()Text1.Text=str1Text2.Text=str2str1=" "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