窗体上添加有3个命令按钮,分别命名为Command1、Command2和Command3。编写Command1的单击事件过程,
A.Private Sub Command1_Click() Command2.Visible=True Command3.Visible=False End Sub
B.Private Sub Command1_Click() Command2.Enabled=True Command3.Enabled=False End Sub
C.Private Sub Command1_Click() Command2.Enabled=True Command3.Visible=False End Sub
D.Private Sub Command1_Click() Command2.Visible=True Command3.Enabled=False End Sub