您可能需要选择new对话框窗口之中的Show All Wizards复选框以得到以下的这些选项。
You may need to select the Show All Wizards check box in the New dialog window to make this option available.
其他小部件包括选项卡、图表、窗口（对话框）、树、布局管理器、增强的表单控件、工具栏和菜单、拖放操作和直接远程功能（direct remoting）。
Some of the other widgets that come with ExtJS include tabs, charts, windows (dialogs), trees, layout managers, enhanced form controls, toolbars and menus, drag and drop, and direct remoting.
screen选项捕获窗口在根窗口上显示的外观，因此包含所有覆盖的对话框、正在执行的菜单操作等等。
The -screen option captures a window as it appears atop the root window and therefore includes any overlaid dialogs, in-progress menu actions, and so on.
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