error "a cast operator is attempting to reduce the size of a pointer"

[jeff012]

Hi, I am tring to built ugui to stm8l151and use STVD.but i got a error "a cast operator is attempting to reduce the size of a pointer", the error is at blow function:

UG_DriverRegister(DRIVER_DRAW_LINE,(void*)HW_DrawLine);

i don't know the root cause,can you help me?