C++ members using template in non-template class - c++

Question

A clean rebuild in Visual Studio made the whole thing work.
--
In a Visual Studio MFC project, I am making a class to manage buttons.
Here is my problem : I need to add Click Handler at runtime so I can't use Message Map. So I had a clickHandler function pointer in my class, en a function to register the click handler. That was ok for global function, but I want to use class members as ClickHandlers.
After a lot search, I came to this function :
class NRButton : public CButton
{
...
template<class Type>
inline void SetClickHandler(
void (*cb)(CObject * , void (CObject::*)()),
Type * pt,
void (Type::*fn)()
)
{
callbackHandler = cb;
objectHandler = pt;
clickHandler = fn;
}
...
}
This function is implemented inline as you can see, but when I build my project I've got this linker error :
FenetreParametrage.obj : error LNK2019: symbole externe non résolu "public: void __thiscall NRButton::SetClickHandler<class FenetreParametrage>(void (__cdecl*)(class CObject *,void (__thiscall CObject::*)(void)),class FenetreParametrage *,void (__thiscall FenetreParametrage::*)(void))" (??$SetClickHandler#VFenetreParametrage###NRButton##QAEXP6AXPAVCObject##P81#AEXXZ#ZPAVFenetreParametrage##P82#AEXXZ#Z) référencé dans la fonction "public: virtual int __thiscall FenetreParametrage::OnInitDialog(void)" (?OnInitDialog#FenetreParametrage##UAEHXZ)
After cleaning the error message I've got that :
FenetreParametrage.obj : error LNK2019: symbole externe non résolu "
public: void __thiscall NRButton::SetClickHandler<class FenetreParametrage>(
void (__cdecl*)(class CObject *,void (__thiscall CObject::*)(void)),
class FenetreParametrage *,
void (__thiscall FenetreParametrage::*)(void)
)
"
référencé dans la fonction "
public: virtual int __thiscall FenetreParametrage::OnInitDialog(void)
"
I understand this error message, but I don't understand why it appears, my function declared inline, so why VS Compiler can't find its implementation ?
Thanks for your help
EDIT :
Here is the call to the function :
bouton->SetClickHandler(
&FenetreParametrage::Callback,
this,
&FenetreParametrage::OnBoutonClick
);