What is the reason of form ProcessDialogKey not trigger the Escape key when focus is on the WinForms TreeViewAdv?

Handle OnKeyDown event in TreeViewAdv

If TreeViewAdv has focus and Escape key is pressed, ProcessDialogKey event of the TreeViewAdv gets triggered only when the TreeNodeAdv is in edit mode (Setting LableEdit to true). Hence ProcessDialogKey of the Form hosting TreeViewAdv not triggers Escape if TreeViewAdv has focus and Escape key is pressed.

To override this behavior, we can derive TreeViewAdv and override KeyDown event and call base.ProcessDialogKey to trigger Escape.

protected override void OnKeyDown(System.Windows.Forms.KeyEventArgs e)
{
    base.ProcessDialogKey(e.KeyData);

    if (e.KeyData == System.Windows.Forms.Keys.Escape)
    {
        e.Handled = false;
    }

    base.OnKeyDown(e);
}

Protected Overrides Sub OnKeyDown(ByVal e As System.Windows.Forms.KeyEventArgs)
    MyBase.ProcessDialogKey(e.KeyData)

    If e.KeyData = System.Windows.Forms.Keys.Escape Then
        e.Handled = False
    End If

    MyBase.OnKeyDown(e)
End Sub

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What is the reason of form ProcessDialogKey not trigger the Escape key when focus is on the WinForms TreeViewAdv?

Handle OnKeyDown event in TreeViewAdv

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