dllcode.h

学习运用MFC封装类的DLL,可以实现GUI 的通用性.

#ifdef DLLDIR_EX
#define DLLDIR  __declspec(dllexport)
#else
#define DLLDIR  __declspec(dllimport)
#endif

extern "C" { 
	// We delete the function DLLfun1 (as defined 
	// in the W32DLL DLL) it writes to
	// a console, not a window, it isn't appropriate to 
	// call it from a MFC Client.
	int  DLLDIR DLLfun2(int);
	void DLLDIR DrawEllipse ( CRect, CDC* ); // a MFC function call 
}; 

extern int  DLLDIR DLLArg; 

class DLLDIR DLLclass
{
public:
	DLLclass();          // Class Constructor
	~DLLclass();         // Class destructor
	int Add(int, int);   // Class function Add
	int Sub(int, int);   // Class function Subtract
	int Arg;
};