Unit 'Controls' Package
[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] [#lcl]

TKeyEvent

Defines an event handler for key events.

Declaration

Source position: controls.pp line 413

type TKeyEvent = procedure(

  Sender: TObject;

  var Key: Word;

  Shift: TShiftState

) of object;

Arguments

Sender

  

TObject for the key event.

Key

  

ScanCode for the key in the event.

Shift

  

TShiftState modifier for the specified key.

Description

TKeyEvent is an object procedure type which specifies a handler for key events.

TKeyEvent is the type used to implement the OnKeyDown and OnKeyUp event handlers in TWinControl. Applications must implement an object procedure using the signature for the event, and assign it to the event handler to respond to the notification.

See TKeyPressEvent for the handler used to implement OnKeyPress events.



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