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Compiler Error C2695

'function1': overriding virtual function differs from 'function2' only by calling convention

The signature of a function in a derived class cannot override a function in a base class and change the calling convention.

The following sample generates C2695:

// C2695.cpp
class C {
   virtual void __fastcall func();

class D : public C {
   virtual void __clrcall func();   // C2695