''' <summary>
''' Creates CID font of PDF document based on TrueType font.
''' </summary>
''' <param name="pdfFilename">The filename of PDF document.</param>
''' <param name="trueTypeFontFilename">The filename of TrueType font.</param>
Public Shared Sub CreateCIDFont(pdfFilename As String, trueTypeFontFilename As String)
    ' open PDF document
    Using document As New Vintasoft.Imaging.Pdf.PdfDocument(pdfFilename)
        ' create CID font of PDF document based on TrueType font
            '...
        Dim newFont As Vintasoft.Imaging.Pdf.Tree.Fonts.PdfFont = document.FontManager.CreateCIDFontFromTrueTypeFont(trueTypeFontFilename)
    End Using
End Sub

/// <summary>
/// Creates CID font of PDF document based on TrueType font.
/// </summary>
/// <param name="pdfFilename">The filename of PDF document.</param>
/// <param name="trueTypeFontFilename">The filename of TrueType font.</param>
public static void CreateCIDFont(string pdfFilename, string trueTypeFontFilename)
{
    // open PDF document
    using (Vintasoft.Imaging.Pdf.PdfDocument document = new Vintasoft.Imaging.Pdf.PdfDocument(pdfFilename))
    {
        // create CID font of PDF document based on TrueType font
        Vintasoft.Imaging.Pdf.Tree.Fonts.PdfFont newFont = 
            document.FontManager.CreateCIDFontFromTrueTypeFont(trueTypeFontFilename);
        //...
    }
}