如何调用CObList::IsEmpty()??

[本浪]

编译报错：error C2039: 'IsEmpty' : is not a member of 'CObject'

可是MSDN上却有如下内容
CObList::IsEmpty
BOOL IsEmpty( ) const;

Return Value

Nonzero if this list is empty; otherwise 0.

Remarks

Indicates whether this list contains no elements.

Example

CObList list;
CAge* pa1;
CAge* pa2;
ASSERT( list.IsEmpty()); // Yes it is.
list.AddHead( pa1 = new CAge( 21 ) );
list.AddHead( pa2 = new CAge( 40 ) ); // List now contains (40, 21).
ASSERT( !list.IsEmpty()); // No it isn't.
list.RemoveAll(); // CAge's aren't destroyed.
ASSERT( list.IsEmpty()); // Yes it is.
delete pa1; // Now delete the CAge objects.
delete pa2;

[本浪]

没人知道吗？

[askyou]

老兄，运行了你的程序，我把CAge换成别的类 ，没有问题。
多半是你的CAge类有问题