单项选择题

以下不正确的定义语句是( )。

A. Private Sub Form _ Db1Click( )    Forml.Hide    Form2.Show 0  End Sub
B. Private Sub Form _ Db1Click( )    Form1.Hide    Form 2.Show 1  End Sub 
C. Private Sub Form _ Click( )    Form l.Hide    Form 2.Show  End Sub
D. Private Sub Form _ Dbl Click( )    Form l.Enabled=False    Form 2.Enabled=True  End Sub