public void ReadAcroForm(PdfDictionary root)
{
if (root == null)
return;
hashMap = root.hashMap;
PushAttrib(root);
PdfArray fieldlist = (PdfArray)PdfReader.GetPdfObjectRelease(root.Get(PdfName.FIELDS));
if (fieldlist != null) {
IterateFields(fieldlist, null, null);
}
}