แก้ไข PPT ใน Java

Presentation pres = new Presentation("pres.ppt");
try {
    ISlide slide = pres.getSlides().get_Item(0);
    IAutoShape shape = slide.getShapes().addAutoShape(ShapeType.Rectangle, 10, 10, 100, 50);
    shape.getTextFrame().setText("New text");

    pres.save("pres.ppt", SaveFormat.Ppt);
} finally {
    if (pres != null) pres.dispose();
}