定义一个类clsB,包含一个公共对象成员m_oA,类型为clsA
Public m_oA As clsA
'在类的Initialize事件中初始化对象成员clsA
Private Sub Class_Initialize()
Set m_oA = New clsA
End Sub
'在类的Terminate事件中释放对象的引用
Private Sub Class_Terminate()
Set m_oA = Nothing
End Sub
'在另外一个子过程中调用,就可以了
Public Sub subC()
Dim oA As clsA