可以从工具栏(见图5)或映射的上下文菜单(见图6)调用Test map函数。

You can invoke the Test map function from the toolbar (Figure 5) or the context menu of the map (Figure 6).

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然而，如果在浏览器的地址栏编辑了一个错误的文件名，那么 error404 函数（在前面定义）将向用户通知这一错误。

If, however, a creative and mischievous soul edits a bad file name in his browser's address bar, the error404 function (defined above) will inform the user of it.

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工具栏小部件然后会自动将 My_ToolbarAction 小部件切换到编辑模式并调用其 Onedit 函数。

The toolbar widget then automatically switches the My_ToolbarAction widget's mode to edit mode and calls its onedit function.

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