Tuberculosis (TB) is a disease caused by bacteria that are spread from person to person through the air. TB usually affects the lungs, but it can also affect other parts of the body, such as the brain, the kidneys, or the spine.ultidrug-resistant TB (MDR TB) is caused by an organism that is resistant to at least isoniazid and rifampin, the two most potent TB drugs.
The WithEvents statement and the Handles clause are often the best choice for event handlers because the declarative syntax they use makes event handling easier to code, read and debug. However, be aware of the following limitations on the use of WithEvents variables:
1 A nested class that is static does not require an object of its top-level class and does not implicitly have a reference to an object of the top-level class. 2  When the user presses Enter in a JTextField or JPasswordField, the GUI component generates an ActionEvent (package java.awt.event). The GUI component with which the user interacts is the event source. 2  An ActionEvent object contains information about the event that just occurred, such as the event source and the text in the text field. 3  ActionEvent method getSource returns a reference to the event source.