Declares a variable or an array at the procedure level within a subroutine or a function, so that the values of the variable or the array are retained after exiting the subroutine or function. Dim statement conventions are also valid.
在子例程或函数中声明过程级别的变量或数组，以便在退出子例程或函数后，能够保留这些变量或数组的值。Dim 语句的规范也仍然有效。