NAME
        FillRexxMsg - Fill the argument strings as needed

    SYNOPSIS
        result = FillRexxMsg(msgptr, count, mask)
        D0                   A0      D0     D1 [0:15]

        bool fillrexxmsg(struct rexxmsg *,ulong,ulong);

    FUNCTION
        This function will convert and install up to 16 argument strings into
        a rexxmsg structure.  the message packet's argument fields must be
        set to either a pointer to a NULL terminated string or an integer value
        The mask, bits 0 to 15, correspond to the type of value is stored
        in the argument slot.  If the bit is cleared, the argument is a
        string pointer; if the bit is set, the argument is an integer.

    INPUTS
        msgptr - Pointer to a rexxmsg (allocated via createrexxmsg)
        count - The number of argument slots to fill in.  This number should
                be from 1 to 16.

        mask - A bit mask corresponding to the 16 fields that is used to
               determine the type of the field.

    RESULTS
        result - A boolean.  If it is TRUE, the call worked.  If it is false,
                 some allocation did not work.  All argstrings that were
                 created will be released.

    SEE ALSO
        clearrexxmsg(), createargstring(), deleteargstring(), createrexxmsg()

    BUGS