• exOLEDropEffectNone (0), Drop target cannot accept the data, or the drop operation was cancelled
• exOLEDropEffectCopy (1), Drop results in a copy of data from the source to the target. The original data is unaltered by the drag operation.
• exOLEDropEffectMove (2), Drop results in data being moved from drag source to drop source. The drag source should remove the data from itself after the move.

The source component should logically Or together the supported values and places the result in the allowedeffects parameter. The target component can use this value to determine the appropriate action (and what the appropriate user feedback should be).
You may wish to defer putting data into the ExDataObject object until the target component requests it. This allows the source component to save time.  If the user does not load any formats into the ExDataObject, then the drag/drop operation is canceled. Use the Data object to provide the data that need to be dragged to other OLE component. Use the OLEDropMode property to enable the OLE drag and drop operations in the control. 

// OLEStartDrag event is not supported. Use the DragEnter,DragLeave,DragOver, DragDrop ... events.

// OLEStartDrag event is not supported. Use the DragEnter,DragLeave,DragOver, DragDrop ... events.

private void OLEStartDrag(object sender, AxEXMLGRIDLib._IXMLGridEvents_OLEStartDragEvent e)
{
}

void OnOLEStartDrag(LPDISPATCH Data,long FAR* AllowedEffects)
{
}

void __fastcall OLEStartDrag(TObject *Sender,Exmlgridlib_tlb::IExDataObject *Data,long * AllowedEffects)
{
}

procedure OLEStartDrag(ASender: TObject; Data : IExDataObject;var AllowedEffects : Integer);
begin
end;

procedure OLEStartDrag(sender: System.Object; e: AxEXMLGRIDLib._IXMLGridEvents_OLEStartDragEvent);
begin
end;

begin event OLEStartDrag(oleobject Data,long AllowedEffects)
end event OLEStartDrag

Private Sub OLEStartDrag(ByVal sender As System.Object, ByVal e As AxEXMLGRIDLib._IXMLGridEvents_OLEStartDragEvent) Handles OLEStartDrag
End Sub

Private Sub OLEStartDrag(ByVal Data As EXMLGRIDLibCtl.IExDataObject,AllowedEffects As Long)
End Sub

Private Sub OLEStartDrag(ByVal Data As Object,AllowedEffects As Long)
End Sub

LPARAMETERS Data,AllowedEffects

PROCEDURE OnOLEStartDrag(oXMLGrid,Data,AllowedEffects)
RETURN

<SCRIPT EVENT="OLEStartDrag(Data,AllowedEffects)" LANGUAGE="JScript">
</SCRIPT>

<SCRIPT LANGUAGE="VBScript">
Function OLEStartDrag(Data,AllowedEffects)
End Function
</SCRIPT>

Procedure OnComOLEStartDrag Variant llData Integer llAllowedEffects
	Forward Send OnComOLEStartDrag llData llAllowedEffects
End_Procedure

METHOD OCX_OLEStartDrag(Data,AllowedEffects) CLASS MainDialog
RETURN NIL

// OLEStartDrag event is not supported. Use the DragEnter,DragLeave,DragOver, DragDrop ... events.

function OLEStartDrag as v (Data as OLE::Exontrol.XMLGrid.1::IExDataObject,AllowedEffects as N)
end function

function nativeObject_OLEStartDrag(Data,AllowedEffects)
return

The following samples shows how to enable drag and drop operation between exMLGrid control an other controls, using the OLEDropMode property on exOLEDropManual. If the OLEDropMode property is exOLEDropManual the OLEStartDrag and/or OLEDragDrop events must be handled.

The following VB sample enables drag and drop nodes to a text editor:

Private Sub Form_Load()
    With XMLGrid1
        .BeginUpdate
            .OLEDropMode = exOLEDropManual
            With .Editors.Add("Float", EditType)
                .Numeric = exFloat
            End With
            With .Editors.Add("DropDown", DropDownListType)
                .AddItem 1, "Yes"
                .AddItem 2, "No"
            End With
            With .Nodes
                With .Add("Root").Nodes
                    With .Add("Child 1", "1.2")
                        .Editor = "Float"
                    End With
                    With .Add("Child 2", "1")
                        .Editor = "DropDown"
                    End With
                End With
            End With
        .EndUpdate
    End With
End Sub

Private Sub XMLGrid1_OLEStartDrag(ByVal Data As EXMLGRIDLibCtl.IExDataObject, AllowedEffects As Long)
    AllowedEffects = EXMLGRIDLibCtl.exOLEDropEffectCopy
    Data.SetData XMLGrid1.FocusNode.Name, EXMLGRIDLibCtl.exCFText
End Sub

The following C++ sample enables drag and drop nodes to a text editor:

#include "Node.h"
#import <exmlgrid.dll>
void OnOLEStartDragXmlgrid1(LPDISPATCH Data, long FAR* AllowedEffects) 
{
	*AllowedEffects = EXMLGRIDLib::exOLEDropEffectCopy;
	if ( EXMLGRIDLib::IExDataObjectPtr spData = Data )
	{
		COleVariant vtValue = m_xmlgrid.GetFocusNode().GetName();
		spData->SetData( vtValue, COleVariant( (long)EXMLGRIDLib::exCFText ) );
	}
}

The #import <exmlgrid.dll> is called to import definitions for ExDataObject and ExDataObjectFiles objects. The #import <exmlgrid.dll> creates the EXMLGRIDLib namespace where all objects and types that eXMLGrid exports. If you need to drag data from eXMLGrid control to a window you need to use RegisterDragDrop API function. The RegisterDragDrop API function registers the specified window as one that can be the target of an OLE drag-and-drop operation and specifies the IDropTarget instance to use for drop operations. Shortly, you need an object that implements the IDropTarget interface, and to call the RegisterDragDrop API function. The OLEStartDrag event is not called if the OLEDropMode property is exOLEDropNone.

The following VB.NET sample enables drag and drop nodes to a text editor:

Private Sub AxXMLGrid1_OLEStartDrag(ByVal sender As Object, ByVal e As AxEXMLGRIDLib._IXMLGridEvents_OLEStartDragEvent) Handles AxXMLGrid1.OLEStartDrag
    e.allowedEffects = EXMLGRIDLib.exOLEDropEffectEnum.exOLEDropEffectCopy
    e.data.SetData(AxXMLGrid1.FocusNode.Name, EXMLGRIDLib.exClipboardFormatEnum.exCFText)
End Sub

The OLEStartDrag event is not called if the OLEDropMode property is exOLEDropNone.

The following C# sample enables drag and drop nodes to a text editor:

private void axXMLGrid1_OLEStartDrag(object sender, AxEXMLGRIDLib._IXMLGridEvents_OLEStartDragEvent e)
{
	e.allowedEffects = Convert.ToUInt16(EXMLGRIDLib.exOLEDropEffectEnum.exOLEDropEffectCopy);
	e.data.SetData(axXMLGrid1.FocusNode.Name, EXMLGRIDLib.exClipboardFormatEnum.exCFText);
}

The OLEStartDrag event is not called if the OLEDropMode property is exOLEDropNone.

The following VFP sample enables drag and drop nodes to a text editor:

*** ActiveX Control Event ***
LPARAMETERS data, allowedeffects

allowedeffects = 1 && exOLEDropEffectCopy
with thisform.XMLGrid1
	data.SetData( .FocusNode.Name, 1 )  && exCFText
endwith

The OLEStartDrag event is not called if the OLEDropMode property is exOLEDropNone.