How to programmatically perform syntax highlighting in the WinForms SyntaxEditor (EditControl)?

public Form1()
{
    InitializeComponent();
    IConfigLanguage language = this.editControl1.Configurator.CreateLanguageConfiguration("New");
    Split s1 = new Split("/*");
    Split s2 = new Split("*/");
    language.Splits.Add(s1); 
    language.Splits.Add(s2);
    this.editControl1.ApplyConfiguration(language);
    ISnippetFormat keyword = this.editControl1.Language.Add("Keyword");
    keyword.Font = new Font("Arial", 10, FontStyle.Regular);
    keyword.FontColor = Color.Blue;
    ISnippetFormat comment = this.editControl1.Language.Add("Comment");
    comment.Font = new Font("Arial", 10, FontStyle.Regular);
    comment.FontColor = Color.Green;
    ISnippetFormat text = this.editControl1.Language.Add("Text");
    text.FontColor = Color.Brown;
    text.Font = new Font("Arial", 10);
    ConfigLexem keywordlexem1 = new ConfigLexem("private", "", FormatType.Custom, false);
keywordlexem1.FormatName = "Keyword";
    this.editControl1.Language.Lexems.Add(keywordlexem1);
    ConfigLexem keywordlexem2 = new ConfigLexem("int", "", FormatType.Custom, false);
    keywordlexem2.FormatName = "Keyword";
    this.editControl1.Language.Lexems.Add(keywordlexem2);
    ConfigLexem configLex = new ConfigLexem("this", "", FormatType.Custom, false);
    configLex.FormatName = "Keyword";
    this.editControl1.Language.Lexems.Add(configLex);
    ConfigLexem commentlexem = new ConfigLexem("/*","*/", FormatType.Custom,true);
    commentlexem.FormatName = "Comment";
    commentlexem.OnlyLocalSublexems = true;
    ConfigLexem configLex1 = new ConfigLexem("[a-z|A-Z]*", "", FormatType.Custom, false);
    configLex1.IsBeginRegex = true;
    configLex1.FormatName = "Text";
    this.editControl1.Language.Lexems.Add(commentlexem);
    this.editControl1.Language.ResetCaches();
    this.editControl1.Text = "this is the first line\nthis is the second line\nthis is the third line\n\n/* Sample */\n\nprivate int";
 }

Public Sub New()
   ' This call is required by the Windows Form Designer.
   InitializeComponent()
   Dim language As IConfigLanguage =   Me.EditControl1.Configurator.CreateLanguageConfiguration("New")
   Dim s1 As Split = New Split("/*")
   Dim s2 As Split = New Split("*/")
   language.Splits.Add(s1)
   language.Splits.Add(s2)
   Me.EditControl1.ApplyConfiguration(language)
   Dim keyword As ISnippetFormat = Me.EditControl1.Language.Add("Keyword")
   keyword.Font = New Font("Arial", 10, FontStyle.Regular)
   keyword.FontColor = Color.Blue
   Dim comment As ISnippetFormat = Me.EditControl1.Language.Add("Comment")
   comment.Font = New Font("Arial", 10, FontStyle.Regular)
   comment.FontColor = Color.Green
   Dim text As ISnippetFormat = Me.EditControl1.Language.Add("Text")
   text.FontColor = Color.Brown
   text.Font = New Font("Arial", 10)
   Dim keywordlexem1 As ConfigLexem = New ConfigLexem("private", "", FormatType.Custom, False)
   keywordlexem1.FormatName = "Keyword"
   Me.EditControl1.Language.Lexems.Add(keywordlexem1)
   Dim keywordlexem2 As ConfigLexem = New ConfigLexem("int", "", FormatType.Custom, False)
   keywordlexem2.FormatName = "Keyword"
   Me.EditControl1.Language.Lexems.Add(keywordlexem2)
   Dim configLex As ConfigLexem = New ConfigLexem("this", "", FormatType.Custom, False)
   configLex.FormatName = "Keyword"
   Me.EditControl1.Language.Lexems.Add(configLex)
   Dim commentlexem As ConfigLexem = New ConfigLexem("/*", "*/", FormatType.Custom, True)
   commentlexem.FormatName = "Comment"
   commentlexem.OnlyLocalSublexems = True
   Dim configLex1 As ConfigLexem = New ConfigLexem("[a-z|A-Z]*", "", FormatType.Custom, False)
   configLex1.IsBeginRegex = True
   configLex1.FormatName = "Text"
   Me.EditControl1.Language.Lexems.Add(commentlexem)
   Me.EditControl1.Language.ResetCaches()
   Me.EditControl1.Text = "this is the first line" & Constants.vbLf & "this is the second line" &   Constants.vbLf & "this is the third line" & Constants.vbLf + Constants.vbLf & "/* Sample */" & Constants.vbLf + Constants.vbLf & "private int"
   End Sub
End Class