Function RunningTotal(ByVal Num As Integer) As Integer
Static ApplesSold As Integer
ApplesSold = ApplesSold + Num
Return ApplesSold ' ApplesSold keeps its current value.
End Function
如果没有使用 Static 就已声明了 ApplesSold,则在函数调用期间将不保留以前累计的值,并且函数只返回上次用来调用它的相同值。