Difference between revisions of "SET KEY"

Latest revision as of 16:12, 23 November 2009

Purpose

Define hot keys

Syntax

SET KEY <expN> TO <procedure name>

See Also

INKEY(), PRINTSCREEN(), PROCNAME(), PROCLINE(), READKEY(), READVAR(), SET KEY TO, SET PCKEYS

Description

The SET KEY...TO command enables a user, running an application, to press a key which will cause execution of the specified procedure whenever the program is waiting for keyboard input. All keys, excluding a through z and 0 through 9, may be used.

NOTE: It is important to distinguish this command from SET KEY TO <expN> which has a different purpose.

On completion of the procedure, execution of the application continues from the point at which it left. Any valid Recital command can be used in the procedure. The <expN> is the INKEY() value of the key and <procedure name> is the procedure to be executed when the key is pressed. The executed procedure specified in the SET KEY command is passed three parameters with the values of PROCNAME(), PROCLINE(), and READVAR() respectively.

Example

procedure showlist
  save screen
  aliasnam = select()
  use shows in workarea()
  display all
  select &aliasnam
  restore screen
return
 
set key 28 to showlist
accept "Enter Show Name (F1 for Help)" to event

Products

Recital