System.Windows.Forms.Control.DndOver C# (CSharp) Method

		internal virtual void DndOver (DragEventArgs e) {
			try {
				OnDragOver (e);
			} catch { }
		}

		private bool Accepting_HandlePositionEvent (ref XEvent xevent)
		{
			pos_x = (int) xevent.ClientMessageEvent.ptr3 >> 16;
			pos_y = (int) xevent.ClientMessageEvent.ptr3 & 0xFFFF;

			// Copy is implicitly allowed
			Control source_control = MwfWindow (source);
			if (source_control == null)
				allowed = EffectsFromX11Source (source, xevent.ClientMessageEvent.ptr5) | DragDropEffects.Copy;
			else
				allowed = drag_data.AllowedEffects;

			IntPtr parent, child, new_child, last_drop_child;
			parent = XplatUIX11.XRootWindow (display, 0);
			child = toplevel;
			last_drop_child = IntPtr.Zero;
			while (true) {
				int xd, yd;
				new_child = IntPtr.Zero;
				
				if (!XplatUIX11.XTranslateCoordinates (display,
						    parent, child, pos_x, pos_y,
						    out xd, out yd, out new_child))
					break;
				if (new_child == IntPtr.Zero)
					break;
				child = new_child;

				Hwnd h = Hwnd.ObjectFromHandle (child);
				if (h != null) {
					Control d = Control.FromHandle (h.client_window);
					if (d != null && d.allow_drop)
						last_drop_child = child;
				}
			}

			if (last_drop_child != IntPtr.Zero)
				child = last_drop_child;

			if (target != child) {
				// We have moved into a new control 
				// or into a control for the first time
				Finish ();
			}
			target = child;
			Hwnd hwnd = Hwnd.ObjectFromHandle (target);
			if (hwnd == null)
				return true;

			Control c = Control.FromHandle (hwnd.client_window);

			if (c == null)
				return true;
			if (!c.allow_drop) {
				SendStatus (source, DragDropEffects.None);
				Finish ();
				return true;
			}

			control = c;
			position_recieved = true;			

			if (converts_pending > 0)
				return true;

			if (!status_sent) {
				drag_event = new DragEventArgs (data, 0, pos_x, pos_y,
					allowed, DragDropEffects.None);
				control.DndEnter (drag_event);
				
				SendStatus (source, drag_event.Effect);
				status_sent = true;
			} else {
				drag_event.x = pos_x;
				drag_event.y = pos_y;
				control.DndOver (drag_event);

				SendStatus (source, drag_event.Effect);
			}
			
			return true;
		}