I was able to show task notes icon, as appears in MS Project, by creating custom cell. But I was unable to show desired notes as tooltip, is there anyway to show tooltip on a custom cell image, specific to different rows?
You can put a string in the GridNode.UserReference and then pick it up in the mouse move event:
private void gantt1_OnGridMouseMove(object sender, System.Windows.Forms.MouseEventArgs e)< ?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
if (cell.Node.UserReference is string)
tooltiptext=cell.Node.UserReference as string;