Why do C++ class definitions on Windows often have a macro token after 'class'? -

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I am trying to understand an open source project, where I came in a declaration of the following category: 

  Class STATE_API AttributeSubject: Public Attribution Group, Public Subject {Public: Attribute Subject (const char *); Virtual ~ feature theme (); Virtual Zero SelectAll () = 0; Virtual const std :: string TypeName () console; Virtual Zero Notification (); Virtual Attributes * CreateComedContact (Const Strude :: String and Shouldst); Virtual Attributes * New instance (Bull copy) Const {Return 0; }; Virtual Bull VarChangeRequetReset (Zero) {return false; }; };

What does STATE_API indicate before the class name AttributeSubject? Is this some kind of macro?

This is probably __declspec (dllimport) or __declspec (dllexport)

Neil is right , This is a macro.

This usually looks like this: 

  #FIDF INDSIDE_DLL # define STATE_API __declspec STATE_API __declsped (dllimport) #endif

You define INSIDE_DLL only in your DLL and export all sections declared with STATE_API macro. / P>


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