PreviewKeyDown Event

Description

Occurs immediately before the KeyDown event.

Syntax

Public Event PreviewKeyDown( _
    ByRef [KeyCode] As Integer, _
    ByVal [Shift] As Integer, _
    ByRef [Cancel] As Boolean _
)

Parameters

• KeyCode
  ASCII code for the key that was pressed.

• Shift
  Specifies whether the Shift, Ctrl, or ALT keys were pressed.

• Cancel
  Set to True to cancel the KeyDown event from occurring.

Remarks

The PreviewKeyDown event will occur immediately BEFORE the KeyDown event is fired to give you a chance to cancel or filter a key press if needed.

Any combination of the Shift, Alt, and Ctrl keys can be used. The table below shows the possible values for the Shift parameter:

Shift Parameter Value	Bit Mask
Shift	1
Ctrl	2
Shift + Ctrl	3
Alt	4
Alt + Shift	5
Alt + Ctrl	6
Shift + Alt + Ctrl	7

See Also

• TrackControl Control
• KeyDown Event

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