In this second program i did the same and added a led blinking for 1 second on and for 1 second off, my problem is this:

inline BOOL Read_U_b_Yled(void)
{
//return input_state() ;<-- how can i return internal in?
}

inline void Write_U_b_Yled(BOOL v)
{
output_bit(PIN_B1, v);
}

inline extern BOOL Read_U_b_Xswitch(void)
{
return input_state(PIN_A0);
}

inline BOOL Read_U_b_Yled2(void)
{
return input_state(PIN_A0);
}

inline void Write_U_b_Yled2(BOOL v)
{
output_bit(PIN_B0, v);
}