_CP_printer is equivalent to the printer expression BASIC statement.
int _CP_printer(int expression)
This function returns -1 if an error occurs. The error code is contained in _CP_errno.
/* Prints "hi" to the printer.*/ CPSTR * s = _CP_mkstr("hi"); _CP_printer(1); _CP_print(s); _CP_printer(0); _CP_printer(-1);