Compiler Error C2243
'conversion type' conversion from 'type1' to 'type2' exists, but is inaccessible
Access protection (protected or private) prevented conversion from a pointer to a derived class to a pointer to the base class.
The following sample generates C2243:
// C2243.cpp
// compile with: /c
class B {};
class D : private B {};
class E : public B {};
D d;
B *p = &d; // C2243
E e;
B *p2 = &e;