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# 事件

On the Events tab page you can link macros to events that occur in a form's control fields.

When the event occurs, the linked macro will be called. To assign a macro to an event, press the ... button. The Assign Action dialog opens.

要访问此命令...

Open context menu of a selected form element - choose Control - Events tab.

Open Form Controls toolbar or Form Design toolbar, click Control icon - Events tab.

Depending on the control, different events are available. Only the available events for the selected control and context are listed on the Events tab page.
The following events are defined:

## 批准操作

This event takes place before an action is triggered by clicking the control. For example, clicking a "Submit" button initiates a send action; however, the actual "send" process is started only when the When initiating event occurs. The Approve action event allows you to kill the process. If the linked method sends back FALSE, When initiating will not be executed.

## 执行操作

The Execute action event occurs when an action is started. For example, if you have a "Submit" button in your form, the send process represents the action to be initiated.

## 已修改

The Changed event takes place when the control loses the focus and the content of the control has changed since it lost the focus.

## 文字已修改

The Text modified event takes place if you enter or modify a text in an input field.

## 项目状态已修改

The Item status changed event takes place if the status of the control field has changed.

## 在瞄准时

The When receiving focus event takes place if a control field receives the focus.

## 在偏离目标时

当控件字段失去焦点时，发生在偏离目标时事件。

## 已按键

The Key pressed event occurs when the user presses any key while the control has the focus. This event may be linked to a macro for checking entries.

## 已释放键

The Key released event occurs when the user releases any key while the control has the focus.

## 鼠标在内部

The Mouse inside event takes place if the mouse is inside the control field.

## 按住按键的同时移动鼠标

The Mouse moved while key pressed event takes place when the mouse is dragged while a key is pressed. An example is when, during drag-and-drop, an additional key determines the mode (move or copy).

## 鼠标移动

The Mouse moved event occurs if the mouse moves over the control.

## 已按下鼠标键

The Mouse button pressed event occurs if the mouse button is pressed while the mouse pointer is on the control.

请注意，此事件也可用于通知控件上弹出式上下文菜单的请求。

## 已释放鼠标键

The Mouse button released event occurs if the mouse button is released while the mouse pointer is on the control.

## 鼠标在外部

The Mouse outside event takes place when the mouse is outside the control field.

## 更新之前

将用户更改的控件内容写入数据源之前，将会发生“更新前”事件。例如，链接的宏可以通过返回 "FALSE" 阻止执行此操作。

## 更新之后

在用户更改的控件内容写入到数据源之后，会发生“更新后”事件。

## 在重设之前

在重设窗体之前，会发生重设之前事件。 链接的宏可以通过返回 "FALSE" 来阻止此操作。

如果出现下列条件之一，表格会被重设：

1. 用户确认一个被定义为复位按钮的 (HTML) 按钮。

2. 在链接到数据源的表格中创建新的空白记录。例如，在最后的记录中按下下一个记录按钮。

## 重新设置之后

重设窗体后，会发生重设之后事件。