iTextSharp.text.pdf.PdfAppearance.CreateAppearance C# (CSharp) Method

        internal static PdfAppearance CreateAppearance(PdfWriter writer, float width, float height, PdfName forcedName)
        {
            PdfAppearance template = new PdfAppearance(writer);
            template.Width = width;
            template.Height = height;
            writer.AddDirectTemplateSimple(template, forcedName);
            return template;
        }

        public void DrawButton(PdfFormField button, string caption, BaseFont font, float fontSize, float llx, float lly, float urx, float ury)
        {
            PdfAppearance pa = PdfAppearance.CreateAppearance(writer, urx - llx, ury - lly);

            pa.DrawButton(0f, 0f, urx - llx, ury - lly, caption, font, fontSize);
            button.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL, pa);
        }