| position | The position of the handle in the space of Handles.matrix. |
| rotation | The rotation of the handle in the space of Handles.matrix. |
| size | The size of the handle in the space of Handles.matrix. Use HandleUtility.GetHandleSize if you want a constant screen space size. |
| controlID | The control ID for the handle. |
| eventType | The type of event for the handle to act on. You can only use this function with EventType.Repaint. |
Creates a square at a position and rotation with a specified size.