Within this routine, first a check for non-null context handle is made.
在这个例程中，首先检查是否有非空的上下文句柄。
Each of these methods will return null if its opposite component or window is in a different context.
如果其对立组件或窗口处于一个不同的上下文，这些方法中每一个都会返回空。
This method will return null if the focus owner is not in the same context as the calling thread.
如果该焦点所有者未和调用线程处于同一个上下文中，那么该方法会返回空。
Initially, this routine checks if the passed inquiry context is not NULL and is for a group member inquiry.
这个例程首先检查传递的查询上下文是否非null，以及是否是用于组成员查询的上下文。
If the resolved context variable content is null, no replacement occurs and the variable name remains unchanged in the query string (including the "%" signs).
如果解析后的上下文变量内容为空，则不会发生替换，并且变量名称在查询字符串中保持不变(包括“%”符号)。
In effect, such a null value is a type of data column overloading, and in this context, a null value might be understood to represent some aspect of the data.
实际上，这类null值是一种数据列重载，并且在这个上下文中，null值可能被理解为表示数据的某些方面。
In the context of the NorthWind Customer Manager; when a Customer ID that does not exist in the system is used to load a Customer detail, then a Null instance should be returned.
在Northwind客户管理的上下文中，当使用系统中不存在的客户ID加载客户细节时，应该返回一个空实例。
As a cleanup, this context object is set to null once destroy method is called.
当清除时，一旦调用destroy方法，context对象就被设置为null。
In this context, an invalid pointer is one that points to an invalid region in memory, is NULL, contains an unaligned pointer, points to memory block smaller than necessary, and so on.
在这个上下文，一个无效的指针是一个指向无效内存中的区域，是NULL，包含一个不对齐的指针，指向的内存块比必须的还小，等等。
In this context, an invalid pointer is one that points to an invalid region in memory, is NULL, contains an unaligned pointer, points to memory block smaller than necessary, and so on.
在这个上下文，一个无效的指针是一个指向无效内存中的区域，是NULL，包含一个不对齐的指针，指向的内存块比必须的还小，等等。
应用推荐