所有其他的视窗则覆盖于叠置顺序最底层的视窗。
All other Windows overlap the window at the bottom of the z-order.
图形方法的叠置顺序只能在执行阶段透过变更其执行顺序来进行控制。
The z-order of graphics methods can be controlled only by changing their order of execution at run time.
若要移动和追踪上下文群组内的控制项和视窗，您可以利用其叠置顺序来操控。
To move and keep track of controls and windows within the context of a group, you manipulate their z-order.
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