KeyDown Event

An event that triggers when a key is pressed when your control has focus.

Syntax

Visual Basic
C#
Objective-C
Java
C++

event KeyEventHandler KeyDown

'Declaration
 
Event KeyDown As KeyEventHandler

'Usage
 
Dim instance As IAnnAutomationControl
Dim handler As KeyEventHandler
 
AddHandler instance.KeyDown, handler

event KeyEventHandler^ KeyDown

Event Data

The event handler receives an argument of type KeyEventArgs containing data related to this event. The following KeyEventArgs properties provide information specific to this event.

Property	Description
Alt	Gets a value indicating whether the ALT key was pressed.
Control	Gets a value indicating whether the CTRL key was pressed.
Handled	Gets or sets a value indicating whether the event was handled.
KeyCode	Gets the keyboard code for a System.Windows.Forms.Control.KeyDown or System.Windows.Forms.Control.KeyUp event.
KeyData	Gets the key data for a System.Windows.Forms.Control.KeyDown or System.Windows.Forms.Control.KeyUp event.
KeyValue	Gets the keyboard value for a System.Windows.Forms.Control.KeyDown or System.Windows.Forms.Control.KeyUp event.
Modifiers	Gets the modifier flags for a System.Windows.Forms.Control.KeyDown or System.Windows.Forms.Control.KeyUp event. The flags indicate which combination of CTRL, SHIFT, and ALT keys was pressed.
Shift	Gets a value indicating whether the SHIFT key was pressed.
SuppressKeyPress	Gets or sets a value indicating whether the key event should be passed on to the underlying control.

Remarks

If your control is derived from the standard System.Windows.Forms.Control, then you do not need to implement this event (since the default System.Windows.Forms.Control.KeyDown will be used).

Example

For an example, refer to IAnnAutomationControl.

Requirements

Target Platforms

Reference

IAnnAutomationControl Interface
IAnnAutomationControl Members