DropAreaAppearance Property

using System.Windows.Forms;
using Infragistics.Win;
using Infragistics.Win.Misc;

// Set the appearance of the UltraTilePanel.
this.ultraTilePanel1.Appearance.BackColor = Color.Gray;

// Set the border style around the UltraTilePanel.
this.ultraTilePanel1.BorderStyle = Infragistics.Win.UIElementBorderStyle.Etched;

// When tiles are dragged by the user, the space where the tile will be dropped should 
// have a solid red border and a light grey background.
this.ultraTilePanel1.DropAreaAppearance.BackColor = Color.LightGray;
this.ultraTilePanel1.DropAreaAppearance.BorderColor = Color.Red;
this.ultraTilePanel1.DropAreaBorderStyle = Infragistics.Win.UIElementBorderStyle.Solid;

// All tile spaces which are not occupied by tiles should have a yellow back color and 
// an inset border style.
this.ultraTilePanel1.EmptyTileAreaAppearance.BackColor = Color.Yellow;
this.ultraTilePanel1.EmptyTileAreaBorderStyle = Infragistics.Win.UIElementBorderStyle.Inset;

// Customize the appearance of the scrollbars so they show the min and max scroll buttons.
this.ultraTilePanel1.ScrollBarLook.ShowMinMaxButtons = Infragistics.Win.DefaultableBoolean.True;

// The default header back color should be light blue.
this.ultraTilePanel1.TileSettings.HeaderAppearance.BackColor = Color.LightBlue;