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AllowDrop Property

Gets/sets whether the associated dock controls support drag and drop operations.
Syntax
'Declaration
 
Public Property AllowDrop As Boolean
public bool AllowDrop {get; set;}
Remarks

By default, drag drop operations are enabled. If the mouse is moved over a sliding group or tab item during a drag drop operation, the associated pane is selected. If the mouse is moved over the tab item for an unpinned control pane during a drag drop operation, the control will flyout.

Example
The following example demonstrates the initialization of the properties of the UltraDockManager component.

Imports Infragistics.Shared
Imports Infragistics.Win
Imports Infragistics.Win.UltraWinDock

Private Sub btnInitializeManager_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnInitializeManager.Click

    ' SupportThemes determines if the component will make use of
    ' the windows themes when the system themes are available and
    ' enabled. we will disable them to allow custom appearances
    ' to be set. if true, the system themed captions, buttons, etc
    ' will be used to render the component
    Me.ultraDockManager1.SupportThemes = False

    ' Allowdrop only works in a single threaded apartment
    ' when enabled, unpinned control panes will flyout when
    ' dragging (see System.Windows.Forms.Control.DoDragDrop for
    ' more on drag drop in .net) over the tabs of the unpinned
    ' panes and will also switch the tabs of docked and floating
    ' tab groups.
    Me.ultraDockManager1.AllowDrop = True

    ' Allow flyout animations - if disabled, the flyout window
    ' will not appear to slide out but will simply be positioned
    ' with the appropriate flyout size
    Me.ultraDockManager1.AnimationEnabled = True

    ' Add an appearance to the components appearances collection
    ' the appearance will be saved in any created layouts and
    ' may be shared by the various appearance properties
    Dim tabAreaAppearance As Infragistics.Win.Appearance = Me.ultraDockManager1.Appearances.Add("unpinnedTabArea")
    tabAreaAppearance.BackColor = SystemColors.InactiveCaption
    tabAreaAppearance.BorderColor = SystemColors.InactiveBorder

    ' Initialize the unpinned tab area appearance to use this appearance
    ' object we just created
    Me.ultraDockManager1.UnpinnedTabAreaAppearance = tabAreaAppearance

    ' Alter the appearance for the unpinned tab area - this is the 
    ' area around the edge of the hosting control (form or usercontrol) 
    ' that contains the tabs representing the unpinned control panes
    Me.ultraDockManager1.BorderStyleUnpinnedTabArea = UIElementBorderStyle.Etched

    ' Set the position for the caption buttons
    Me.ultraDockManager1.CaptionButtonAlignment = CaptionButtonAlignment.Near

    ' Soft popup when active
    Me.ultraDockManager1.CaptionButtonStyle = UIElementButtonStyle.PopupSoftBorderless

    ' Use VS style captions - this will affect the general appearance
    ' and colors of the captions as well as the images used for the 
    ' button images
    Me.ultraDockManager1.CaptionStyle = CaptionStyle.VSNet

    ' Use layered windows instead of a drag outline - layered windows
    ' makes use of the Opacity of the form which internally relies upon
    ' the LayeredWindow api's and therefore is only supported under
    ' windows 2000. if layered windows are not supported by the os on
    ' which the app is running, the drag outline will be rendered instead
    Me.ultraDockManager1.DragWindowStyle = DragWindowStyle.LayeredWindow

    ' The layered window should be red with a 30% opacity
    Me.ultraDockManager1.DragWindowColor = Color.Red
    Me.ultraDockManager1.DragWindowOpacity = 0.3D

    ' Set the imagelist that will be used by the component. the imagelist
    ' is used to access images when an appearance's 'Image' property is
    ' set to an integer and is assumed to be the index of the image
    ' in the associated imagelist
    Me.ultraDockManager1.ImageList = Me.imageList1

    ' We want to make sure that floating windows are currently displayed.
    ' this can be set to false to hide the floating windows without hiding
    ' all of the docked manager's panes. to hide all the panes, use the 
    ' 'Visible' property of the component.
    Me.ultraDockManager1.ShowFloatingWindows = True

    ' Prevent the dock manager from showing tooltips. by default, tooltips
    ' are displayed when the text for a tab or caption is not large enough
    ' to display the text.
    Me.ultraDockManager1.ShowToolTips = False

    ' Make the splitter bars appear a little different from the 
    ' default control color used for the panes so they are more
    ' noticable
    Me.ultraDockManager1.SplitterBarAppearance.BackColor = SystemColors.ControlLightLight

    ' Initialize the border style used for the caption area
    Me.ultraDockManager1.DefaultPaneSettings.BorderStyleCaption = UIElementBorderStyle.Solid

    ' The default width for a fixed width tab will be 75 pixels. this 
    ' will only affect the width of tabs' whose GroupSettingsResolved.TabSizing
    ' is set to 'TabSizing.Fixed'.
    Me.ultraDockManager1.DefaultPaneSettings.TabWidth = 75

End Sub
using Infragistics.Shared;
using Infragistics.Win;
using Infragistics.Win.UltraWinDock;
using System.Diagnostics;

private void btnInitializeManager_Click(object sender, System.EventArgs e)
{

	// SupportThemes determines if the component will make use of
	// the windows themes when the system themes are available and
	// enabled. we will disable them to allow custom appearances
	// to be set. if true, the system themed captions, buttons, etc
	// will be used to render the component
	this.ultraDockManager1.SupportThemes = false;

	// Allowdrop only works in a single threaded apartment
	// when enabled, unpinned control panes will flyout when
	// dragging (see System.Windows.Forms.Control.DoDragDrop for
	// more on drag drop in .net) over the tabs of the unpinned
	// panes and will also switch the tabs of docked and floating
	// tab groups.
	this.ultraDockManager1.AllowDrop = true;

	// Allow flyout animations - if disabled, the flyout window
	// will not appear to slide out but will simply be positioned
	// with the appropriate flyout size
	this.ultraDockManager1.AnimationEnabled = true;

	// Add an appearance to the components appearances collection
	// the appearance will be saved in any created layouts and
	// may be shared by the various appearance properties
	Infragistics.Win.Appearance tabAreaAppearance = this.ultraDockManager1.Appearances.Add( "unpinnedTabArea" );
	tabAreaAppearance.BackColor = SystemColors.InactiveCaption;
	tabAreaAppearance.BorderColor = SystemColors.InactiveBorder;

	// Initialize the unpinned tab area appearance to use this appearance
	// object we just created
	this.ultraDockManager1.UnpinnedTabAreaAppearance = tabAreaAppearance;

	// Alter the appearance for the unpinned tab area - this is the 
	// area around the edge of the hosting control (form or usercontrol) 
	// that contains the tabs representing the unpinned control panes
	this.ultraDockManager1.BorderStyleUnpinnedTabArea = UIElementBorderStyle.Etched;

	// Set the position for the caption buttons
	this.ultraDockManager1.CaptionButtonAlignment = CaptionButtonAlignment.Near;

	// Soft popup when active
	this.ultraDockManager1.CaptionButtonStyle = UIElementButtonStyle.PopupSoftBorderless;

	// Use VS style captions - this will affect the general appearance
	// and colors of the captions as well as the images used for the 
	// button images
	this.ultraDockManager1.CaptionStyle = CaptionStyle.VSNet;

	// Use layered windows instead of a drag outline - layered windows
	// makes use of the Opacity of the form which internally relies upon
	// the LayeredWindow api's and therefore is only supported under
	// windows 2000. if layered windows are not supported by the os on
	// which the app is running, the drag outline will be rendered instead
	this.ultraDockManager1.DragWindowStyle = DragWindowStyle.LayeredWindow;

	// The layered window should be red with a 30% opacity
	this.ultraDockManager1.DragWindowColor = Color.Red;
	this.ultraDockManager1.DragWindowOpacity = 0.3d;

	// Set the imagelist that will be used by the component. the imagelist
	// is used to access images when an appearance's 'Image' property is
	// set to an integer and is assumed to be the index of the image
	// in the associated imagelist
	this.ultraDockManager1.ImageList = this.imageList1;

	// We want to make sure that floating windows are currently displayed.
	// this can be set to false to hide the floating windows without hiding
	// all of the docked manager's panes. to hide all the panes, use the 
	// 'Visible' property of the component.
	this.ultraDockManager1.ShowFloatingWindows = true;

	// Prevent the dock manager from showing tooltips. by default, tooltips
	// are displayed when the text for a tab or caption is not large enough
	// to display the text.
	this.ultraDockManager1.ShowToolTips = false;

	// Make the splitter bars appear a little different from the 
	// default control color used for the panes so they are more
	// noticable
	this.ultraDockManager1.SplitterBarAppearance.BackColor = SystemColors.ControlLightLight;

	// Initialize the border style used for the caption area
	this.ultraDockManager1.DefaultPaneSettings.BorderStyleCaption = UIElementBorderStyle.Solid;

	// The default width for a fixed width tab will be 75 pixels. this 
	// will only affect the width of tabs' whose GroupSettingsResolved.TabSizing
	// is set to 'TabSizing.Fixed'.
	this.ultraDockManager1.DefaultPaneSettings.TabWidth = 75;

}
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also