>Static variables doesn't exist in VFP. You'll have to declare the variable elsewhere (maybe in a class property) to make it available each time the method is called.

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>How do I set a 'static' variable in VF, just as I do it in C/C++?Originally the lift time of local variable is only within that procedure or function, how can I get it back as I come in afterwards?

That wouldn't be adequate. A static variable of a class is shared across all instances of the class.