Convert Lambda expression to function pointer

I am using Visual-C++ 2013 (But this tag seems to be not available here).

I have a struct

struct init_param{
    bool (*validation)(double**);
};

And I want to cast a member function ValidateParameters of the instance model. So I tried to use a Lambda Expression:

init_params params;
params.validation = [&model](double **par){return model.ValidateParameters(par); };

But the Compiler says:

error C2440: '=': 'main::< lambda_d8b99bf9b28e45558a48b7e9148b3202>' can not be converted into 'bool (__cdecl *)(double **)'

How to proceed? Or what is the easiest way to change the init_param struct, that hte Lambda expression would work?