//In the header file "PrimaryGeneratorAction.hh":

#include "PrimaryGeneratorActionMessenger.hh"

private:
	PrimaryGeneratorActionMessenger* fMessenger;
	
	G4int fMyVAR;

public:
	void SetMethod(G4int ival) {fMyVAR = ival;};


//In the constructor of the src file "PrimaryGeneratorAction.cc":
fMessenger = new PrimaryGeneratorActionMessenger(this);


/gun/setGPS true