visual c++ - Reusable Class - Using "abstract" instead of pre-defined -

I am creating an application where there are multiple classes that come from a single base class. Let me assume that I have this announcement:

  Ref Class WorkScreenBase Summary (Internal: Workbenbase (zero); Bull is loaded;}   
 I have many Classes that apply it, for example:  
  Ref: Class Main Screen: Public Workbenchbase {Internal: Main Screen (Zero); ~ MainScreen (Zero);}  < / Pre> 
 In the second part of the application, keep me a container for possible implementation of  WorkScreenBase  So, I'm trying to use:  
  workbenchbase ^ myCurrentBase;   
 However, it seems that it will be illegal to face the problem What would be the best way?  
  Update:  I can use a  main screen ^ myCurrentScreen , but for base class flexibility reasons As a reference point.   
 
 
 This issue was fixed in a way which I did not expect (at least thrown in accordance with the compiler error) Problem header file was in cross-reference. In some way, with header guards and  #pragma once , I ended up with a circular  .h  reference  
 Then,  Conclusion :  
 
 The compiler can remove errors that might not describe the problem.  
 Check the header twice for circular references. Header guards and  #pragma are good once, but this will not help you.