KeyDown Event

Visual Basic (Declaration)
Visual Basic (Usage)
C#
Managed Extensions for C++
C++/CLI

Public Shadows Event KeyDown As EventHandler(Of VtKeyEventArgs)

Dim instance As Vt
Dim handler As EventHandler(Of VtKeyEventArgs)
 
AddHandler instance.KeyDown, handler

public new event EventHandler<VtKeyEventArgs> KeyDown

public: new __event EventHandler<VtKeyEventArgs*>* KeyDown

public:
new event EventHandler<VtKeyEventArgs^>^ KeyDown

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

Property	Description
Alt	(Inherited from System.Windows.Forms.KeyEventArgs)
Control	(Inherited from System.Windows.Forms.KeyEventArgs)
Extended	Returns true when the generating key is on an extended part of the keyboard.
Handled	(Inherited from System.Windows.Forms.KeyEventArgs)
KeyCode	(Inherited from System.Windows.Forms.KeyEventArgs)
KeyData	(Inherited from System.Windows.Forms.KeyEventArgs)
KeyValue	(Inherited from System.Windows.Forms.KeyEventArgs)
Modifiers	(Inherited from System.Windows.Forms.KeyEventArgs)
Shift	(Inherited from System.Windows.Forms.KeyEventArgs)
SuppressKeyPress	(Inherited from System.Windows.Forms.KeyEventArgs)

The KeyDown event is raised when a key is pressed and before the KeyPress event is raised. This event is useful for performing keymapping (mapping individual keys to any arbitrary character sequence). To do this, simply set e.Handled to true (notifying the Vt control that the key down was handled so the Vt control does not raise the KeyPress event) and send your own substituted character sequence.

In the following example, the string "Hello World!" is mapped to Ctrl-H.

C#

private void vt1_KeyDown(object sender, Dart.Emulation.VtKeyEventArgs e)
{
    //If there is a telnet connection
    if (telnet1.State != ConnectionState.Closed)
    {
        //Send substitute string when Control-H pressed
        if (e.Control && e.KeyCode == Keys.H)
        {
            e.Handled = true; //prevent other key events
            telnet1.Write("Hello World!");
        }
    }
}

Visual Basic

Private Sub vt1_KeyDown(ByVal sender As Object, ByVal e As Dart.Emulation.VtKeyEventArgs)
    'If there is a telnet connection
    If telnet1.State <> ConnectionState.Closed Then
        'Send substitute string when Control-H pressed
        If e.Control AndAlso e.KeyCode = Keys.H Then
            e.Handled = True 'prevent other key events
            telnet1.Write("Hello World!")
        End If
    End If
End Sub

Reference

Vt Class
Vt Members