在要于稍后加入程序码的启动显示画面中，不能够包含预留位置文字。

You cannot include placeholder text in the splash screen that is later added by your code.

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预留位置文字会显示直到使用者编辑控制项为止，控制项中会填入资料来源中的资料，否则控制项的内容就会被删除。

The placeholder text is displayed until a user edits the control, the control is populated with data from a data source, or the control's contents are deleted.

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