CStringArray跟CDWordArray使用RemoveAt（)时候需不需要释放内存

CStringArray和CDWordArray使用RemoveAt（)时候需不需要释放内存？
MSDN上这样说：
The RemoveAt function removes the CObject pointer from the array, but it does not delete the object itself.

The following table shows other member functions that are similar to CObArray::RemoveAt.

Class Member Function  
CByteArray 
 void RemoveAt( INT_PTR nIndex , INT_PTR nCount = 1 ); 
 
CDWordArray 
 void RemoveAt( INT_PTR nIndex , INT_PTR nCount = 1 ); 
 
CPtrArray 
 void RemoveAt( INT_PTR nIndex , INT_PTR nCount = 1 ); 
 
CStringArray 
 void RemoveAt( INT_PTR nIndex , INT_PTR nCount = 1 ); 
 
CUIntArray 
 void RemoveAt( INT_PTR nIndex , INT_PTR nCount = 1 ); 
 
CWordArray 
 void RemoveAt( INT_PTR nIndex, INT_PTR nCount = 1 );
 



------解决方案--------------------
CStringArray内部已有释放代码，不需要手动释放。
------解决方案--------------------
打开 mfc/array_d.cpp 看看实现代码就清除了， 
RemoveAt的时候用memmove_s移动数据块，并且只改变下大小，
完全释放是在解析、调用FreeExtra、和SetSize改变大小时发生