/// <summary>
/// Notifies the DragDropHelper that the specified Control received
/// a DragEnter event.
/// </summary>
/// <param name="dropHelper">The DragDropHelper instance to notify.</param>
/// <param name="control">The Control the received the DragEnter event.</param>
/// <param name="data">The DataObject containing a drag image.</param>
/// <param name="cursorOffset">The current cursor's offset relative to the window.</param>
/// <param name="effect">The accepted drag drop effect.</param>
public static void DragEnter(this IDropTargetHelper dropHelper, Control control, IDataObject data, Point cursorOffset, DragDropEffects effect)
{
IntPtr controlHandle = IntPtr.Zero;
if (control != null)
{
controlHandle = control.Handle;
}
Win32Point pt = SwfDragDropLibExtensions.ToWin32Point(cursorOffset);
dropHelper.DragEnter(controlHandle, (ComIDataObject)data, ref pt, (int)effect);
}
/// <summary>
/// Notifies the DragDropHelper that the current Control received
/// a Drop event.
/// </summary>
/// <param name="dropHelper">The DragDropHelper instance to notify.</param>
/// <param name="data">The DataObject containing a drag image.</param>
/// <param name="cursorOffset">The current cursor's offset relative to the window.</param>
/// <param name="effect">The accepted drag drop effect.</param>
public static void Drop(this IDropTargetHelper dropHelper, IDataObject data, Point cursorOffset, DragDropEffects effect)
{
Win32Point pt = SwfDragDropLibExtensions.ToWin32Point(cursorOffset);
dropHelper.Drop((ComIDataObject)data, ref pt, (int)effect);
}
/// <summary>
/// Notifies the DragDropHelper that the current Control received
/// a DragOver event.
/// </summary>
/// <param name="dropHelper">The DragDropHelper instance to notify.</param>
/// <param name="cursorOffset">The current cursor's offset relative to the window.</param>
/// <param name="effect">The accepted drag drop effect.</param>
public static void DragOver(this IDropTargetHelper dropHelper, Point cursorOffset, DragDropEffects effect)
{
Win32Point pt = SwfDragDropLibExtensions.ToWin32Point(cursorOffset);
dropHelper.DragOver(ref pt, (int)effect);
}