使用Spire.Presentation第三方把PPT转换成图片播放_spire.presentation 演示ppt

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Spire.Presentation;
using System.Runtime.InteropServices;
using Spire.Presentation.Drawing.Transition;
using Spire.Presentation.Drawing;
using System.Drawing.Imaging;
using System.IO;

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        private List<Image> lst = new List<Image>();
        //获取当前幻灯片页码
        private int ImageIndex = 0;
        private Timer timer1 = new Timer();
        // 幻灯片的数量
        int slidescount;
        //文件夹地址
        string stythFile = @"C:\TASHCurrPathImg";
        //图片地址
        s