Answer: To get the first line of text from a string created left-to-right
        char *str;
        XmString xmstr;
        /* stuff to create xmstr */
        ...
        /* set str to point to the text */
        XmStringGetLtoR(xmstr, XmSTRING_DEFAULT_CHARSET, &str);
        /* use the string */
        ...
        /* and reclaim space */
        XtFree(str);
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