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Learn more about: Me, My, MyBase, and MyClass in Visual Basic |
Me, My, MyBase, and MyClass |
07/20/2015 |
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f8e241ae-b1ed-4886-9aa0-08c632154029 |
Me, My, MyBase, and MyClass in Visual Basic have similar names, but different purposes. This topic describes each of these entities in order to distinguish them.
The Me keyword provides a way to refer to the specific instance of a class or structure in which the code is currently executing. Me behaves like either an object variable or a structure variable referring to the current instance. Using Me is particularly useful for passing information about the currently executing instance of a class or structure to a procedure in another class, structure, or module.
For example, suppose you have the following procedure in a module.
Sub ChangeFormColor(FormName As Form)
Randomize()
FormName.BackColor = Color.FromArgb(Rnd() * 256, Rnd() * 256, Rnd() * 256)
End Sub You can call this procedure and pass the current instance of the xref:System.Windows.Forms.Form class as an argument by using the following statement.
ChangeFormColor(Me) The My feature provides easy and intuitive access to a number of .NET Framework classes, enabling the Visual Basic user to interact with the computer, application, settings, resources, and so on. For a list of these classes, see the Visual Basic Run-time Objects reference.
The MyBase keyword behaves like an object variable referring to the base class of the current instance of a class. MyBase is commonly used to access base class members that are overridden or shadowed in a derived class. MyBase.New is used to explicitly call a base class constructor from a derived class constructor.
The MyClass keyword behaves like an object variable referring to the current instance of a class as originally implemented. MyClass is similar to Me, but all method calls on it are treated as if the method were NotOverridable.