单选题
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，完成的功能为：当单击按钮Command1时，按钮Command2可用，按钮Command3不可见。以下正确的是______。
- A.Private Sub Command1_Click()
Command2.Visible=True
Command3.Visible=True End Sub
- B.Private Sub Command1_Click()
Command2.Enabled=False
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=False
Command3.Enabled=True End Sub