event OLEDragDrop (Data as ExDataObject, Effect as Long, Button as Integer, Shift as Integer, X as OLE_XPOS_PIXELS, Y as OLE_YPOS_PIXELS)
Occurs when a source component is dropped onto a target component when the source component determines that a drop can occur.

TypeDescription
Data as ExDataObject An ExDataObject object containing formats that the source will provide and, in addition, possibly the data for those formats. If no data is contained in the ExDataObject, it is provided when the control calls the GetData method. The SetData and Clear methods cannot be used here.
Effect as Long A Long set by the target component identifying the action that has been performed (if any), thus allowing the source to take appropriate action if the component was moved (such as the source deleting the data). The possible values are listed in Remarks.
Button as Integer An integer which acts as a bit field corresponding to the state of a mouse button when it is depressed. The left button is bit 0, the right button is bit 1, and the middle button is bit 2. These bits correspond to the values 1, 2, and 4, respectively. It indicates the state of the mouse buttons; some, all, or none of these three bits can be set, indicating that some, all, or none of the buttons are depressed.
Shift as Integer An integer which acts as a bit field corresponding to the state of the SHIFT, CTRL, and ALT keys when they are depressed. The SHIFT key is bit 0, the CTRL key is bit 1, and the ALT key is bit 2. These bits correspond to the values 1, 2, and 4, respectively. The shift parameter indicates the state of these keys; some, all, or none of the bits can be set, indicating that some, all, or none of the keys are depressed. For example, if both the CTRL and ALT keys were depressed, the value of shift would be 6.
X as OLE_XPOS_PIXELS A single that specifies the current X location of the mouse pointer. The X value is always expressed in container coordinates
Y as OLE_YPOS_PIXELS A single that specifies the current Y location of the mouse pointer. The Y value is always expressed in container coordinates.
In the /NET Assembly, you have to use the DragDrop event as explained here:

The OLEDragDrop event is fired when the user has dropped files or clipboard information into the control. Use the OLEDropMode property on exOLEDropManual to enable OLE drop and drop support. Use the EventFromPoint property to get the event from point. Use the DateTimeFromPoint property to get the date-time from point in the schedule part of the control. Use the DateFromPoint property to retrieve the date from the cursor over the calendar section of the control. Use the Add method to add a event to the control. The Background( exScheduleOLEDropPosition) property specifies the visual appearance of the line to be shown when the cursor is hovering the schedule part of the control, during an OLE drag and drop operation.

The settings for Effect are:

Syntax for OLEDragDrop event, /NET version, on: 

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


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

Syntax for OLEDragDrop event, /COM version, on: 

private void OLEDragDrop(object sender, AxEXSCHEDULELib._IScheduleEvents_OLEDragDropEvent e)
{
}


void OnOLEDragDrop(LPDISPATCH Data,long FAR* Effect,short Button,short Shift,long X,long Y)
{
}


void __fastcall OLEDragDrop(TObject *Sender,Exschedulelib_tlb::IExDataObject *Data,long * Effect,short Button,short Shift,int X,int Y)
{
}


procedure OLEDragDrop(ASender: TObject; Data : IExDataObject;var Effect : Integer;Button : Smallint;Shift : Smallint;X : Integer;Y : Integer);
begin
end;


procedure OLEDragDrop(sender: System.Object; e: AxEXSCHEDULELib._IScheduleEvents_OLEDragDropEvent);
begin
end;


begin event OLEDragDrop(oleobject Data,long Effect,integer Button,integer Shift,long X,long Y)
end event OLEDragDrop


Private Sub OLEDragDrop(ByVal sender As System.Object, ByVal e As AxEXSCHEDULELib._IScheduleEvents_OLEDragDropEvent) Handles OLEDragDrop
End Sub


Private Sub OLEDragDrop(ByVal Data As EXSCHEDULELibCtl.IExDataObject,Effect As Long,ByVal Button As Integer,ByVal Shift As Integer,ByVal X As Single,ByVal Y As Single)
End Sub


Private Sub OLEDragDrop(ByVal Data As Object,Effect As Long,ByVal Button As Integer,ByVal Shift As Integer,ByVal X As Long,ByVal Y As Long)
End Sub


LPARAMETERS Data,Effect,Button,Shift,X,Y



PROCEDURE OnOLEDragDrop(oSchedule,Data,Effect,Button,Shift,X,Y)
RETURN

Syntax for OLEDragDrop event, /COM version (others), on: 

<SCRIPT EVENT="OLEDragDrop(Data,Effect,Button,Shift,X,Y)" LANGUAGE="JScript">
</SCRIPT>


<SCRIPT LANGUAGE="VBScript">
Function OLEDragDrop(Data,Effect,Button,Shift,X,Y)
End Function
</SCRIPT>


Procedure OnComOLEDragDrop Variant llData Integer llEffect Short llButton Short llShift OLE_XPOS_PIXELS llX OLE_YPOS_PIXELS llY
	Forward Send OnComOLEDragDrop llData llEffect llButton llShift llX llY
End_Procedure


METHOD OCX_OLEDragDrop(Data,Effect,Button,Shift,X,Y) CLASS MainDialog
RETURN NIL


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


function OLEDragDrop as v (Data as OLE::Exontrol.Schedule.1::IExDataObject,Effect as N,Button as N,Shift as N,X as OLE::Exontrol.Schedule.1::OLE_XPOS_PIXELS,Y as OLE::Exontrol.Schedule.1::OLE_YPOS_PIXELS)
end function


function nativeObject_OLEDragDrop(Data,Effect,Button,Shift,X,Y)
return

The following VB sample adds a new event for each dragged file ( Open the Windows Explorer, click and drag a file to the control ) :

Private Sub Schedule1_OLEDragDrop(ByVal Data As EXSCHEDULELibCtl.IExDataObject, Effect As Long, ByVal Button As Integer, ByVal Shift As Integer, ByVal X As Single, ByVal Y As Single)
    If Data.GetFormat(exCFFiles) Then
        With Schedule1
            Dim d As Date
            d = .DateTimeFromPoint(-1, -1)
            If Not (d = 0) Then
                With .Events
                    Dim f As Variant
                    For Each f In Data.Files
                        .Add(d, d + 2 / 24).ExtraLabel = f
                    Next
                End With
            End If
        End With
    End If
End Sub

The sample queries the date-time over the schedule part of the control, and add a new event for each dragged file.