Erase to the end of the row
void SLsmg_erase_eol (void);
SLsmg_erase_eol erases all characters from the current
position to the end of the line. The newly created space is given
the color of the current color. This function has no effect on the
position of the virtual cursor.
SLsmg_gotorc, SLsmg_erase_eos, SLsmg_fill_region