Enter

Enter() Event

Called before the form is displayed

Applies to: Form , Grid , TabbedItem

Enter

This event is called before the form is actually displayed. This event handler is usually used to initialize form controls before the form is actually displayed. Because the form has not actually been created within Windows at this time, any OCX controls it contains have yet to be instantiated and so cannot be referenced here. However the standard KCML controls do exist and can be inspected or modified at this time.

Tab

This event handler is called on the new tab page each time the specific tab page is exposed. This event handler would normally be used to initialize various controls on the tab page prior to the tab page being exposed. It is recommended that tab controls with many tabs each containing many controls do their initialization using this event rather than doing it in the form's Enter() event so that there is less of a delay when the form is first created.

 DEFEVENT WizForm.tabControl1.tab1.Enter()
        ..tab1.DisableNext = TRUE;
 END EVENT

Note that the event will not be generated if the tab is clicked or tabbed onto when it is already the active tab. It is only called for the new active tab page when the active tab page is switched to another tab page on the same tab control.

Also it will not be generated when the form is opened with the tab already enabled. To be consistent and have this event triggered for all tab pages, it may be necessary to disable the tab control at design time and explicitely enable it in the forms show() event.

There is also a Exit() event that can be triggered for the previous tab when a new tab is activated.

Grid

This event handler is called when the user tabs into a grid control. It is not triggered if the user passes focus to the grid by explicitly clicking on a cell.

See also

Form methods, properties and events. Grid methods, properties and events. TabbedItem methods, properties and events.