嘿嘿，我把帮助贴出来，请楼下翻译 function Assigned(var P): Boolean;DescriptionUse Assigned to determine whether the pointer or procedure referenced by P is nil. P must be a variable reference of a pointer or procedural type. Assigned(P) corresponds to the test P<> nil for a pointer variable, and @P <> nil for a procedural variable.Assigned returns False if P is nil, True otherwise.Note: Assigned can't detect a dangling pointer--that is, one that isn't nil but no longer points to valid data. For example, in the code example for Assigned, Assigned won't detect the fact that P isn't valid.
assigned:(var P) Boolean;描述使用assigned决定是否指针或程序叁考的藉着 P 是无。 P 一定是一个变数一个指针或程序的类型叁考。 分配 (P) 符合测试 P<> 无为一个指针变数 , 和 @ P<>为一个程序的变数无。分配了回返错误的如果 P 是无, 真实的以别方式。注意:分配不能发现一个吊动指针-- 是,除了对有效的数据没有较长的点之外不是无的一个。 举例来说, 在密码例子中为分配, 分配将不发现事实 P 不是有效 ========================================================= 金山快译真烂，楼上的付工资
assigned为True就表示对象可以访问
function Assigned(var P): Boolean;DescriptionUse Assigned to determine whether the pointer or procedure referenced by P is nil. P must be a variable reference of a pointer or procedural type. Assigned(P) corresponds to the test P<> nil for a pointer variable, and @P <> nil for a procedural variable.Assigned returns False if P is nil, True otherwise.Note: Assigned can't detect a dangling pointer--that is, one that isn't nil but no longer points to valid data. For example, in the code example for Assigned, Assigned won't detect the fact that P isn't valid.
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金山快译真烂，楼上的付工资