C / C++ / MFC

#define ENABLE_FEATURE

#ifdef ENABLE_FEATURE

void foo()
{
	// bar is from the library
	bar();
}

// tell the linker to add this to the libraries
#pragma ???????? // some way to tell the linker to do that?

#endif

class CMobileData
{
  public:
	bool DriverInstalled();//virtual function
	bool DevicePresent();//Virtual function
}

class CMobileData_A: public CMobileData
{
//These 2 methods are implemented in this class and will contain info(strings) unique to this card hardcoded in them.
  public:
	bool DriverInstalled();
	bool DevicePresent();
}

class CMobileData_B: public CMobileData
{
//These 2 methods are implemented in this class and will contain info(strings) unique to this card hardcoded in them.
  public:
	bool DriverInstalled();
	bool DevicePresent();
}