Static Variables


Normally, the lifetime of a local procedure-level variable ends when the procedure ends. But sometimes you might want a variable to retain its value between each call into the procedure. Sometimes you might also want a million dollars, but you can't always have it. But you can have variables that keep their values if you want. They're called static variables. To declare a static variable, use the Static keyword in place of the Dim keyword.

Static keepingTrack As Integer = 0 


The assignment of zero to keepingTrack is done only once, when creating the instance of the type that contains this statement. Thereafter, it keeps whatever value is assigned to it until the instance is destroyed. Static variables can be created only within procedures.




Start-to-Finish Visual Basic 2005. Learn Visual Basic 2005 as You Design and Develop a Complete Application
Start-to-Finish Visual Basic 2005: Learn Visual Basic 2005 as You Design and Develop a Complete Application
ISBN: 0321398009
EAN: 2147483647
Year: 2006
Pages: 247
Authors: Tim Patrick

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