On Header
Code | Can be called by | Definition |
---|---|---|
5 | 4D Write Pro area - Button - Button Grid - Check Box - Dropdown list - Form (list form only) - Hierarchical List - Input - Picture Button - Picture Pop up menu - Plug-in Area - Progress Indicators - Radio Button - Ruler - Spinner - Splitter - Stepper - Tab control | The form's header area is about to be printed or displayed. |
Description
The On Header
event is called when a record is about to be displayed in a list form displayed via DISPLAY SELECTION
and MODIFY SELECTION
.
This event cannot be selected for project forms, it is only available with table forms.
In this context, the following sequence of calls to methods and form events is triggered:
- For each object in the header area:
- Object method with
On Header
event - Form method with
On Header
event
- Object method with
Printed records are handled using the
On Display Detail
event.
Calling a 4D command that displays a dialog box from the On Header
event is not allowed and will cause a syntax error to occur. More particularly, the commands concerned are: ALERT
, DIALOG
, CONFIRM
, Request
, ADD RECORD
, MODIFY RECORD
, DISPLAY SELECTION
, and MODIFY SELECTION
.