什么是无窗控件？ [英] What is a windowless control?
问题描述
在Windows中，它们称为无窗口控件。
Under Windows their is something called a Windowless Control.
- RichEdit
什么是一个无窗口控件，它有什么好处？
What is a Windowless Control and what are its benefits?
推荐答案
无窗口控件是一个对象，它使您无需进行任何操作即可需要您创建一个窗口。
A Windowless control is an object that gives you the behavior of a control without requiring you to create a window.
当您要修改或扩展行为，或者要在创建窗口会很麻烦或困难的地方使用行为时，这很有用。
This is useful when you want to modify or extend the behavior, or when you want to make use of the behavior in places where creating a window would be awkward or difficult.
例如，您要在页面上嵌入数百个丰富的编辑控件，如果它们是每个窗口，则每个控件都必须获得焦点才能获得
Say, for instance, you want to imbed hundreds of rich edit controls on a page, if they were each windows, then each would have to get focus in order to get user input, and each would paint individually, etc.
但是，如果您愿意跟踪无窗控件的位置并进行其他通常需要的整理工作，通过创建一个窗口（例如，路由键盘消息）免费获得，然后使用无窗口控件可以以较低的开销获得更好的结果。
But if you are willing to keep track of the locations of the windowless controls and do some other housekeeping that you would normally get for free by creating a window (i.e. routing keyboard messages), then you can get better results with lower overhead by using windowless controls.
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