Creates a new <code>DragSourceEffect</code> to handle drag effect from the specified <code>Control</code>.
@param control the <code>Control</code> that the user clicks on to initiate the drag
@exception IllegalArgumentException <ul> <li>ERROR_NULL_ARGUMENT - if the control is null</li> </ul>
See Implementation
Creates a new <code>DragSourceEffect</code> to handle drag effect from the specified <code>Control</code>.
@param control the <code>Control</code> that the user clicks on to initiate the drag
@exception IllegalArgumentException <ul> <li>ERROR_NULL_ARGUMENT - if the control is null</li> </ul>