protected void LoadDocument(IntPtr doc)
{
_document = doc;
PdfiumLibrary.FPDF_GetDocPermissions(_document);
_formCallbacks = new API.FPDF_FORMFILLINFO();
_formCallbacksHandle = GCHandle.Alloc(_formCallbacks, GCHandleType.Pinned);
for (int i = 1; i <= 2; i++)
{
_formCallbacks.version = i;
_form = PdfiumLibrary.FPDFDOC_InitFormFillEnvironment(_document, _formCallbacks);
if (_form != IntPtr.Zero)
{
break;
}
}
PdfiumLibrary.FPDF_SetFormFieldHighlightColor(_form, 0, 0xFFE4DD);
PdfiumLibrary.FPDF_SetFormFieldHighlightAlpha(_form, 100);
PdfiumLibrary.FORM_DoDocumentJSAction(_form);
PdfiumLibrary.FORM_DoDocumentOpenAction(_form);
Bookmarks = new PdfBookmarkCollection();
LoadBookmarks(Bookmarks, PdfiumLibrary.FPDFBookmark_GetFirstChild(_document, IntPtr.Zero));
}