By Anne Prince
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Even supposing this e-book is designed for those who are new to the . internet Framework, visible easy, or perhaps programming, its objectives are formidable. in precisely 20 chapters, you are going to the way to strengthen graphical person interfaces, easy methods to improve purposes that paintings with databases via ADO. internet, how you can advance internet purposes that use net prone and XML, and lots more and plenty extra.
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Additional resources for Murach's Beginning Visual Basic .NET
Then, Sub and End Sub statements are generated for the event. To start a procedure for the Load event of a form, double-click the form itself. The Load event is executed when the form is first displayed. The Sub and End Sub statements The Sub statement that’s generated when you create an event procedure includes a Handles clause that names the object and event 58 the procedure handles. The procedure name that’s generated consists of the object name, an underscore, and the event name. Thus, btnCalculate_Click is the name of the procedure that handles the Click event of the btnCalculate button.
It also introduces you to the properties, methods, and events that are defined by classes and used by objects. As you’ve already seen, the properties of an object define the object’s characteristics and data. For instance, the Name property gives a name to a control, and the Text property determines the text that is displayed within the control. In contrast, the methods of an object determine the operations that can be performed by the object. And an object’s events are signals sent by the object to your application that something has happened that can be responded to.
This event occurs when the user clicks on an object with the mouse. Similarly, the DblClick event occurs when the user doubleclicks on an object. 55 Although the Click and DblClick events are started by user actions, that’s not always the case. For instance, the GotFocus and LostFocus events can occur when the user moves the focus to or from a control, but they can also occur when the Visual Basic code moves the focus to or from a control. Similarly, the Load event of a form can occur when an application first starts.