Gantt Chart

                    ' Draws the bar

                    grfx.DrawRectangle(Pens.Black, obRect)
                    grfx.FillRectangle(obBrush, obRect)

                    'add text to bar
                    Dim txt As String = "raz" & ControlChars.CrLf & "dwa" & ControlChars.CrLf & "trzy"
                    Dim txtFont As New Font("Arial", 10)
                    Dim txtWidth As Integer = grfx.MeasureString(txt, txtFont).Width
                    Dim txtHeight As Integer = grfx.MeasureString(txt, txtFont).Height
                    Dim barWidth As Integer = bar.TopLocation.Right.X - bar.TopLocation.Left.X
 
                    'if text will fit, add it
                    If txtWidth < barWidth And txtHeight < barHeight Then
                        grfx.DrawString(txt, txtFont, Brushes.Black, (barWidth / 2 - txtWidth / 2) + bar.TopLocation.Left.X, (barHeight / 2 - txtHeight / 2) + bar.TopLocation.Left.Y)
                    End If

Private Sub DrawNetHorizontal(ByVal grfx As Graphics)
        Dim FUN As String = "DrawNetHorizontal"
        Dim index As Integer = 0
        Dim width As Integer = 0
        Try
            If shownHeaderList Is Nothing Then Exit Sub
            If shownHeaderList.Count = 0 Then Exit Sub
            index = 0
            width = (widthPerItem * shownHeaderList.Count) + barStartLeft
            For index = 0 To GetIndexChartBar("QQQQQQ")
                Try
                    grfx.DrawLine(lineColor, 0, barStartTop + (barHeight * index) + (barSpace * index), width, barStartTop + (barHeight * index) + (barSpace * index))
                Catch EXC As Exception
                    '...
                End Try
            Next
            lastLineBottomStop = barStartTop + (barHeight * (index - 1)) + (barSpace * (index - 1))
        Catch EXC As Exception
            '...
        End Try
    End Sub

ganttChart1.FromDate = new System.DateTime(2009, 1, 1, 0, 0, 0);
ganttChart1.ToDate = new System.DateTime(2009, 12, 31, 0, 0, 0);
 
List lst = new List();
 
lst.Add(new BarInformation("Row 1", new System.DateTime(2009, 1, 1), new System.DateTime(2009, 5, 1), Color.Gray, Color.LightGray, 0));
lst.Add(new BarInformation("Row 2", new System.DateTime(2009, 1, 1), new System.DateTime(2009, 7, 1), Color.Gray, Color.LightGray, 1));
lst.Add(new BarInformation("Row 3", new System.DateTime(2009, 5, 1), new System.DateTime(2009, 8, 1), Color.Gray, Color.LightGray, 2));
lst.Add(new BarInformation("Row 2", new System.DateTime(2009, 10, 1), new System.DateTime(2009, 12, 1), Color.Gray, Color.LightGray, 3));
lst.Add(new BarInformation("Row 1", new System.DateTime(2009, 8, 1), new System.DateTime(2009, 11, 1), Color.Gray, Color.LightGray, 4));
 
foreach (BarInformation bar in lst)
{
	ganttChart1.AddChartBar(bar.RowText, bar, bar.FromTime, bar.ToTime, bar.Color, bar.HoverColor, bar.Index);
}

If bar.StartValue < FromDate Then
   lengthTimeSpan = endValue - FromDate
Else
   lengthTimeSpan = endValue - bar.StartValue
End If

public Chart()
        {
            InitializeComponent();
 
            ganttChart1.FromDate = new DateTime(2012, 12, 24, 08, 0, 0);
            ganttChart1.ToDate = new DateTime(2012, 12, 24, 18, 0, 0);
 
            DateTime test = new DateTime(2012, 12, 25, 10, 00, 00);
            DateTime test2 = new DateTime(2012, 12, 25, 12, 00, 00);
 
            ganttChart1.AddChartBar("Row 1", null, test, test2, Color.Aqua, Color.Khaki, 0);}
            ganttChart1.AddChartBar("Row 2", null, test, test2, Color.Red, Color.DarkRed, 1);

        private void button1_Click(object sender, EventArgs e)
        {
            DateTime newFrom = ganttChart1.FromDate.AddDays(1);
            DateTime newTo = ganttChart1.ToDate.AddDays(1);
 
            ganttChart1.FromDate = newFrom;
            ganttChart1.ToDate = newTo;
 
            ganttChart1.PaintChart();
            ganttChart1.Refresh();
            
        }

        private void button2_Click(object sender, EventArgs e)
        {
            DateTime newFrom = ganttChart1.FromDate.AddDays(-1);
            DateTime newTo = ganttChart1.ToDate.AddDays(-1);
 
            ganttChart1.FromDate = newFrom;
            ganttChart1.ToDate = newTo;
 
            ganttChart1.PaintChart();
            ganttChart1.Refresh();
        }
 
        private void btnMaand_Click(object sender, EventArgs e)
        {
            DateTime newFrom = new DateTime(ganttChart1.FromDate.Year, ganttChart1.FromDate.Month,1);
            DateTime newTo = new DateTime(ganttChart1.ToDate.Year, ganttChart1.ToDate.Month, 31);
 
            ganttChart1.FromDate = newFrom;
            ganttChart1.ToDate = newTo;
 
            ganttChart1.PaintChart();
            ganttChart1.Refresh();
        }