How to refer to class which was not yet declared?

[CrazyBoy]

This is my global class:

#include "stdafx.h"

MyGlobalClass::MyGlobalClass(int argc, char* argv[]){
	CLParser * CLPars( MyGlobalClass& );
	FILE_ * File( MyGlobalClass& );
	CLPars.ParseArgs(argc, argv);
}

The classes CLParser and file FILE_ were included before global class. I need to have access to MyGlobalClass within these two classes. But the problem is that MyGlobalClass was not declared before. How to solve this problem?

I tried to access the global class as so:

class FILE_{
public:
	void FILE_( MyGlobalClass& );
}

But MyGlobalClass is undeclared.