smangelschots said:

I'm making and ganttchart when I put in the tasks the first start on the left bottom y axis but I like it to start at the left top, is there a way to do this?

only by reversing the order of the data.

smangelschots said:

And I like the x axis to show the week numbers.

here's an IRenderLabel implementation that will print the week numbers.

        string IRenderLabel.ToString(Hashtable context)
        {
            DateTime dt = DateTime.Parse(context["ITEM_LABEL"].ToString());
            int week = CultureInfo.CurrentCulture.Calendar.GetWeekOfYear(dt, CalendarWeekRule.FirstFourDayWeek, DayOfWeek.Monday);
            return "Week " + week;
        }