Windows Procedure and Polymorphic function calls

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C++

Win32

I am creating a screen manager for a game I am creating. The fundamental operation of the screen manager is based on a pointer to a base class that screen objects inherit. Here is the declaration:

class screen_base
{
friend class screen_manager;
public:
    virtual bool init()=0;
    virtual bool deinit()=0;
    virtual bool render()=0;
    virtual bool update()=0;
    virtual void event_handle(HWND, UINT, WPARAM, LPARAM)=0;
protected:
    app_data win_data;
    unsigned int state;
    float fim;
};

whenever I try to call the event_handle() function inside the window procedure (from the pointer) The program just ends execution returning 0, the window is never even created. I tried putting the call into a separate function and calling that in the window procedure but that didn't work either.

Is there any way to call this function?