Attachment.OnMouseDown 屬性 (Access)Attachment.OnMouseDown property (Access)

設定或傳回在 [ 屬性 ] 視窗中的 [ On Mouse Down ] 方塊中的值。Sets or returns the value of the On Mouse Down box in the Properties window. 可讀寫的 StringRead/write String.



_運算式_代表**Attachment** 物件的變數。expression A variable that represents an Attachment object.


此屬性是很有用的以程式設計方式變更時觸發事件,Microsoft Access 所採取的動作。This property is helpful for programmatically changing the action that Microsoft Access takes when an event is triggered. 例如,在各個事件呼叫之間,您也許想要根據不同狀況下所引動的事件,來改變運算式的參數,或是從事件程序轉換到運算式或是巨集。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.

MouseDown 事件發生於使用者同時按下滑鼠按鈕時滑鼠指標停在物件之上。The MouseDown event occurs when the user clicks the mouse button while the mouse pointer rests over the object.

OnMouseDown值會是下列其中一個下列命令,根據 [選擇建立器] 視窗中 (藉由選擇 [ On Mouse Down ] 旁的 [建立] 按鈕方塊物件的 [屬性] 視窗中存取):The OnMouseDown value will be one of the following, depending on the selection chosen in the Choose Builder window (accessed by choosing the Build button next to the On Mouse Down box in the object's Properties window):

  • 如果您選擇 [運算式建立器],值會是 =運算式,其中_expression_是來自 [運算式建立器] 視窗的運算式。If you choose Expression Builder, the value will be =expression, where expression is the expression from the Expression Builder window.

  • 如果您選擇巨集建立器,值會是巨集的名稱。If you choose Macro Builder, the value is the name of the macro.

  • 如果您選擇程式碼建立器,值會是 [Event Procedure]。If you choose Code Builder, the value will be [Event Procedure].

如果 [On Mouse Down] 方塊是空白的,此屬性值為空字串。If the On Mouse Down box is blank, the property value is an empty string.

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