BoldSignEasily embed eSignatures in your .NET applications. Free sandbox with native SDK available.
myChartControl.Hide();
grid[2,2].CellType = "Control";
grid[2,2].Control = myChartControl;
grid.Controls.Add(myChartControl);
You could use a coveredrange if you want it to occupy several cells.
If you want the chart to float over the grid, this will be more work as you have to decide want happens when the grid scrolls. Here is a forum thread that has one potential solution for this scrolling requirement. http://www.syncfusion.com/Support/Forums/message.aspx?MessageID=27889