TOPIC:

page.AddAnnotAttachment("/mnt/sdcard/image.png",  0, new float[]{300,500,330,530})

/**
	 * add a file as an attachment to page.<br/>
	 * you should re-render page to display modified data.<br/>
	 * this can be invoked after ObjsStart or Render or RenderToBmp.<br/>
	 * this method require professional or premium license, and Document.SetCache invoked.
	 * @param path absolute path name to the file.
	 * @param icon icon display to the page. values as:<br/>
	 * 0: PushPin<br/>
	 * 1: Graph<br/>
	 * 2: Paperclip<br/>
	 * 3: Tag<br/>
	 * @param rect 4 elements: left, top, right, bottom in PDF coordinate system.
	 * @return true or false.<br/>
	 * the added annotation can be obtained by Page.GetAnnot(Page.GetAnnotCount() - 1), if this method return true. 
	 */
    final public boolean AddAnnotAttachment(String path, int icon, float[] rect)

    PDF_RECT rect;
    rect.left = 100;
    rect.top = 100;
    rect.right = 150;
    rect.bottom = 150;
    PDFPage *page = [m_doc page:m_cur_page];
    [page addAnnotAttachment:[[NSBundle mainBundle] pathForResource:@"image" ofType:@"png"] :0 :&rect];
    [m_doc save];