SET PREFORM

Purpose

Preform trigger procedure to execute before a form is displayed

Syntax

SET PREFORM TO [<procedure-name> | (<expC>)]

See Also

@...GET, APPEND, CHANGE, CREATE SCREEN, EDIT, FMT(), Function Keys, INSERT, MODIFY SCREEN, QUERY, SET FORMAT, SET POSTFORM, SET POSTRECORD, SET PRERECORD

Description

The PREFORM trigger procedure executes a procedure upon entering a form. The SET PREFORM TO <procedure-name> command defines the procedure or program name to be executed. The filename can be substituted with a <expC>, enclosed in round brackets, which returns a valid filename. The SET PREFORM TO command clears the active <procedure-name>.

The SET PREFORM trigger can also be defined from within the SCREEN PAINTER work surface. The PREFORM procedure option from the TRIGGERS menu is used to define the trigger name. The [HELP] key may be pressed here to edit the trigger file from inside the SCREEN PAINTER.

Example

procedure intiform
  // Display the contents on a memo
  memosay(comp_hist,2,17,15,61)
return
 
select 1
use payroll alias payroll
set form to formname
set preform to initform
edit

Products

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