Calling c++ dll from fortran

[forthelp]

Hallo

I have a c++ dll with four exportable functions.

Let the name of the dll is EXTDLL.dll and the functions are

initiate_SOFCSystem(double * param, double * input, int debug_flag);
kill_SOFCSystem();
operation_GasNode_SOFC( const double* time , double * input, double * output);
operation_WaterNode_SOFC( const double* time , double * input, double * output);

Now if I want to call these functions from fortran , what should I writre between the interface?

Thanks in advance

Selim