NLCONVCLOCK
NM and CM callable.
Converts the time format from a character string to numeric value; checks
the input string using the formatting template returned by itemnum=3 of
the NLINFO intrinsic, then converts the time to the general time format
returned by the CLOCK intrinsic.
I32 CA I16V I16V U16A
time:=NLCONVCLOCK(buffer,bufferlength,langnum,error);