Creates a new <code>DropTargetEffect</code> to handle the drag under effect on the specified <code>Control</code>.
@param control the <code>Control</code> over which the user positions the cursor to drop the data
@exception IllegalArgumentException <ul> <li>ERROR_NULL_ARGUMENT - if the control is null</li> </ul>
See Implementation
Creates a new <code>DropTargetEffect</code> to handle the drag under effect on the specified <code>Control</code>.
@param control the <code>Control</code> over which the user positions the cursor to drop the data
@exception IllegalArgumentException <ul> <li>ERROR_NULL_ARGUMENT - if the control is null</li> </ul>