填空题:把窗体的KeyPreview属性设置为True,然后编写如下两个事件过程:Private Sub Form_KeyDow

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  • 题目类型:填空题
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题目内容:
把窗体的KeyPreview属性设置为True,然后编写如下两个事件过程:
Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)
 Print Chr(KeyCode)
End Sub
Private Sub Form_KeyPress(KeyAscii As Integer)
 Print Chr(KeyAscii)
End Sub
程序运行后,如果直接按键盘上的"A"键(即不按住Shift键),则在窗体上输出的字符分别是______ 和 ______ 。
参考答案:
答案解析:

数据独立性分为逻辑独立性与物理独立性。当数据的存储结构改变时,其逻辑结构可以不变,因此,基于逻辑结构的应用程序不必修改,

数据独立性分为逻辑独立性与物理独立性。当数据的存储结构改变时,其逻辑结构可以不变,因此,基于逻辑结构的应用程序不必修改,称为 。

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