Thread: syntax to pass a member function pointer to another class?

hey,

i'm having trouble working out what the syntax is when you want to pass a member function of a class (from a another member function of that class) to another function (which is a member of another class)...

like this:

Code:

typedef void(*FnToCallback)(void);

class B
{
public:
void Register(FnToCallback passedInFnToCallback);
void FnThatCallsBackLater();

private:
FnToCallback storedFnToCallback;
};


class A
{
public:
A(B classToRegisterTo);
void CallbackFunction();
};

B instanceOfB;
A instanceOfA(instanceOfB);

A::A(B classToRegisterTo)
{
    	classToRegisterTo.Register(CallbackFunction);
}

void A::CallbackFunction()
{
//does something useful
}


void B::Register(FnToCallback passedInFnToCallback)
{
 storedFnToCallback = passedInFnToCallback;
}

void B::FnThatCallsBackLater()
{
storedFnToCallback()
}

int main()
{
//lots of code
instanceOfB.FnThatCallsBackLater();
//more code
}

i think that makes sense

anyway, as it stands, i get an error like this:
cannot convert parameter 1 from 'void (void)' to 'void (__cdecl *)(void)'

i think the problem is that i am trying to pass a pointer to a member function, because if i create a test global function and try to pass that, it works.

thanks in advance to anyone who can decipher all that and help