Pass a cicode global variable argument into a function that is called by a super genie graphic window

INT
FUNCTION
BlockedTrnSetPen(INT hAN, INT nPen, STRING sTrend)
    INT timeout = 5000
    INT sleepTime = 10
    INT error = -1
    INT elapsed = 0
    INT currentTime
    STRING sPenName
    error = TrnSetPen(hAN, nPen, sTrend)
    IF error = 0 THEN
        error = -1
        currentTime = SysTime()
        WHILE error <> 0 AND elapsed < timeout DO
            sPenName = TrnGetPen(hAN, nPen)
            IF sPenName = sTrend THEN
                error = 0
            ELSE
                SleepMS(sleepTime)
                elapsed = elapsed + SysTimeDelta(currentTime)
            END
        END
    END
    RETURN error
END