How to accomplish multiple levels of context choice list implementation in the WinForms SyntaxEditor (EditControl)?

private void editControl1_ContextChoiceBeforeOpen(object sender, System.ComponentModel.CancelEventArgs e)
{
    ILexem lex;
    lex = this.editControl1.ContextChoiceController.LexemBeforeDropper as ILexem;
    if ((lex.Text == "this") || (lex.Text == "me"))
       firstLevel = true;
    else if (ContextChoiceListPresenceCheck(contextChoiceListLevelOne, lex.Text) == true)
       secondLevel = true;
    else
       e.Cancel = true;
}
private void editControl1_ContextChoiceOpen(Syncfusion.Windows.Forms.Edit.Interfaces.IContextChoiceController controller)
{
    if (firstLevel == true)
    {
       controller.Items.Clear();
       for (int i=0; i<contextChoiceListLevelOne.Length; i++)
       {
          controller.Items.Add(contextChoiceListLevelOne[i], "This is a" + contextChoiceListLevelOne[i], this.editControl1.ContextChoiceController.Images[i]);
       } 
    }
    else if (secondLevel == true)
    {
          controller.Items.Clear();
          for (int i=0; i<contextChoiceListLevelOne.Length; i++)
          {
              controller.Items.Add(contextChoiceListLevelTwo[i], "This is a" + contextChoiceListLevelTwo[i], this.editControl1.ContextChoiceController.Images[i]);
          } 
    }
    firstLevel = false;
    secondLevel = false;
}

Private Sub editControl1_ContextChoiceBeforeOpen(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles editControl1.ContextChoiceBeforeOpen
    Dim lex As ILexem
    lex = CType(IIf(TypeOf Me.editControl1.ContextChoiceController.LexemBeforeDropper Is ILexem,       Me.editControl1.ContextChoiceController.LexemBeforeDropper, Nothing), ILexem)    If (lex.Text = "this") OrElse (lex.Text = "me") Then
       firstLevel = True
    Else If ContextChoiceListPresenceCheck(contextChoiceListLevelOne, lex.Text) = True Then
       secondLevel = True
    Else
       e.Cancel = True
    End If
End Sub
Private Sub editControl1_ContextChoiceOpen(ByVal controller As Syncfusion.Windows.Forms.Edit.Interfaces.IContextChoiceController) Handles editControl1.ContextChoiceOpen
    If firstLevel = True Then
       controller.Items.Clear()
    Dim i As Integer=0
    Do While i < contextChoiceListLevelOne.Length
         controller.Items.Add(contextChoiceListLevelOne(i), "This is a" & contextChoiceListLevelOne(i),          Me.editControl1.ContextChoiceController.Images(i))
         i += 1
         Loop
         ElseIf secondLevel = True Then
             controller.Items.Clear()
             Dim i As Integer=0
             Do While i < contextChoiceListLevelOne.Length
                  controller.Items.Add(contextChoiceListLevelTwo(i), "This is a" & contextChoiceListLevelTwo(i), Me.editControl1.ContextChoiceController.Images(i))
                  i += 1
                  Loop
          End If
          firstLevel = False
          secondLevel = False
End Sub