#include <iostream>
#include <utility>
 
#define APIENTRY
using UINT = unsigned;
 
typedef UINT(APIENTRY *PFNFOO)(UINT, double);
 
class Foo
{
public:
    static UINT APIENTRY pfnFoo(UINT x, double y)
    {
        return (UINT)(x*y);
    }
};
 
template<typename RET, typename... PARAMS, typename...Args>
inline RET CallFunc(RET(*pfn)(PARAMS...), Args&&... args)
{
    return (*pfn)(std::forward<Args>(args)...);
}
 
int main()
{
    std::cout << CallFunc(&Foo::pfnFoo, 100, 0.5f) << std::endl;
    return 0;
}
 

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