This component is based on VBox, which is not a visual component

安装了Flex Builder 3,打开主文件切换到'设计视图'却发现出现了以下字样. "This component is based on VBox, which is not a visual component. Switch to source mode to edit it"
解决办法: 选择"windows->Preferences" 展开了Flex,点选Installed Flex SDKs ,"Add"增加sdks路径和名字,ok 应用;设计视图就可以用了.

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转载自kenvincai.iteye.com/blog/2057042