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	001
Ctrl	010
Shift + Ctrl	011
Alt	100
Alt + Shift	101
Alt + Ctrl	110
Shift + Alt + Ctrl	111

See Also

• GridControl Control
• KeyDown Event

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