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class IO_Form;

class IO_Field{

private:

int _row;

int _col;

protected:

void* _data;

IO_Form* _owner;

public:

IO_Field(int row, int col, void* data = (void*)0);

void* data(void);

virtual void display(void)const = 0;

virtual int edit(void)= 0;

virtual bool editable(void)const = 0;

virtual void set(const void *) = 0;

virtual void set(IO_Form* owner);

int getRow(void)const;

int getCol(void)const;

virtual ~IO_Field(void);

};