public void DrawRadioAppearences(PdfFormField field, string value, float llx, float lly, float urx, float ury)
{
PdfAppearance tpOn = PdfAppearance.CreateAppearance(writer, urx - llx, ury - lly);
tpOn.DrawRadioField(0f, 0f, urx - llx, ury - lly, true);
field.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL, value, tpOn);
PdfAppearance tpOff = PdfAppearance.CreateAppearance(writer, urx - llx, ury - lly);
tpOff.DrawRadioField(0f, 0f, urx - llx, ury - lly, false);
field.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL, "Off", tpOff);
}
