NAME
        StrToLong -- string to long value (decimal) (V36)

   SYNOPSIS
        characters = StrToLong(string,value)
        D0                       D1    D2

        long strtolong(strptr, long *)

   FUNCTION
        Converts decimal string into long value.  returns number of characters
        converted.  Skips over leading spaces & tabs (included in count).  If
        no decimal digits are found (after skipping leading spaces & tabs),
        StrToLong returns -1 for characters converted, and puts 0 into value.

   INPUTS
        string - input string.
        value  - Pointer to long value.  Set to 0 if no digits are converted.

   RESULT
        result - Number of characters converted or -1.

   BUGS
        Before V39, if there were no convertible characters it returned the
        number of leading white-space characters (space and tab in this case).