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PreviewKeyDown Event
See Also 
Leadtools.Medical3D Namespace > Medical3DControl Class : PreviewKeyDown Event



Occurs before the System.Windows.Forms.Control.KeyDown event when a key is pressed while focus is on this control.

Syntax

Visual Basic (Declaration) 
<SRCategoryAttribute("Key")>
<SRDescriptionAttribute("Occurs before the KeyDown event when a key is pressed while focus is on this control.")>
Public Event PreviewKeyDown As PreviewKeyDownEventHandler
Visual Basic (Usage)Copy Code
Dim instance As Medical3DControl
Dim handler As PreviewKeyDownEventHandler
 
AddHandler instance.PreviewKeyDown, handler
C# 
[SRCategoryAttribute("Key")]
[SRDescriptionAttribute("Occurs before the KeyDown event when a key is pressed while focus is on this control.")]
public event PreviewKeyDownEventHandler PreviewKeyDown
C++/CLI 
[SRCategoryAttribute("Key")]
[SRDescriptionAttribute("Occurs before the KeyDown event when a key is pressed while focus is on this control.")]
public:
event PreviewKeyDownEventHandler^ PreviewKeyDown

Event Data

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

PropertyDescription
Alt Gets a value indicating whether the ALT key was pressed.
Control Gets a value indicating whether the CTRL key was pressed.
IsInputKey Gets or sets a value indicating whether a key is a regular input key.
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.
Shift Gets a value indicating whether the SHIFT key was pressed.

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7

See Also

Leadtools.Medical3D requires a Document or Medical toolkit license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features