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CommandButton.OnKeyPress 属性 (访问)CommandButton.OnKeyPress Property (Access)

office 365 dev account|上次更新日期: 2018/3/13
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设置或返回属性窗口中击键框中的值。读/写,字符串Sets or returns the value of the On Key Press box in the Properties window. Read/write String.

语法Syntax

表达式OnKeyPressexpression. OnKeyPress

表达式_一个表示命令按钮对象的变量。_expression A variable that represents a CommandButton object.

注解Remarks

该属性有助于以编程方式更改事件别触发时 Microsoft Access 所采取的行动。例如,在各次事件调用之间可能要根据触发事件的环境更改表达式的参数,或从一个事件过程切换到一个表达式或宏。This property is helpful for programmatically changing the action Microsoft Access takes when an event is triggered. For example, between event calls you may want to change an expression's parameters, or switch from an event procedure to an expression or macro, depending on the circumstances under which the event was triggered.

当用户按下某个键时窗体或控件具有焦点时,将发生KeyPress事件。如果您在窗体或控件使用 SendKeys 操作的宏或 Visual Basic 中的SendKeys语句发送击键,也会发生此事件。The KeyPress event occurs when a user presses a key while a form or control has the focus. This event also occurs if you send a keystroke to a form or control by using the SendKeys action in a macro or the SendKeys statement in Visual Basic.

OnKeyPress值将为以下操作,具体取决于在选择生成器窗口 (通过在对象的属性窗口中击键框旁的生成按钮来访问) 中所选内容之一:The OnKeyPress value will be one of the following, depending on the selection chosen in the Choose Builder window (accessed by clicking the Build button next to the On Key Press box in the object's Properties window):

  • 如果选择表达式生成器,则值将为"=表达式" ,其中_表达式_是表达式生成器窗口中的表达式。If Expression Builder is chosen, the value will be "= expression ", where expression is the expression from the Expression Builder window.

  • 如果选择了“宏生成器”,则该值是宏的名称。If Macro Builder is chosen, the value is the name of the macro.

  • 如果选择了“代码生成器”,则该值是“[事件过程]”。If Code Builder is chosen, the value will be "[Event Procedure]".

如果击键框为空,属性值将为空字符串。If the On Key Press box is blank, the property value is an empty string.

示例Example

下面的示例将打印OnKeyPress属性在"订单输入"窗体上"确定"按钮的立即窗口中的值。The following example prints the value of the OnKeyPress property in the Immediate window for the button named "OK" on the "Order Entry" form.

Debug.Print Forms("Order Entry").Controls("OK").OnKeyPress

另请参阅See also

概念Concepts

命令按钮对象CommandButton Object

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