用C#的PictureBox播放本地视频

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Collections;
using System.Runtime.InteropServices;

namespace WindowsFormsApplication1
{
    //API函数声明
   
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            
            PictureBox PlayScreen = pictureBox1;
            string mciCommand;
            //打开指定位置的视频文件
            mciCommand = "open " + " D:\\picture\\2.wmv " + " alias MyAVI ";
            mciCommand = mciCommand + " parent " + PlayScreen.Handle.ToInt32() + " style child ";
            LibWrap.mciSendString(mciCommand, null, 0, 0);
            Rectangle r = PlayScreen.ClientRectangle;
            mciCommand = " put MyAVI window at 0 0 " + r.Width + " " + r.Height;
            LibWrap.mciSendString(mciCommand, null, 0, 0);
            LibWrap.mciSendString(" play MyAVI ", null, 0, 0);
        }
        public class LibWrap
        {

            //mciSendString为API函数，使用C#调用API函数在pictureBox上显示视频
            [DllImport(("winmm.dll "), EntryPoint = "mciSendString", CharSet = CharSet.Auto)]
            public static extern int mciSendString(string lpszCommand, string lpszReturnString,
                        uint cchReturn, int hwndCallback);
        }

        //界面退出按钮
        private void button2_Click(object sender, EventArgs e)
        {

            DialogResult r = MessageBox.Show("退出系统", "提示", MessageBoxButtons.OKCancel,MessageBoxIcon.Information);
            Application.Exit();
        }

        private void button3_Click(object sender, EventArgs e)
        {

            Bitmap bit = new Bitmap(this.Width, this.Height);//实例化一个和窗体一样大的bitmap
            Graphics g = Graphics.FromImage(bit);
            g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;//图像质量设为最好
            //g.CopyFromScreen( this.Left,this.Top,0,0,new Size(this.Width,this.Height));//对整个窗体屏幕截图
            //g.CopyFromScreen( axWindowsMediaPlayer1.PointToScreen(Point.Empty), Point.Empty, axWindowsMediaPlayer1.Size);//对windowsmediaplayer截图
            g.CopyFromScreen(pictureBox1.PointToScreen(Point.Empty), Point.Empty, pictureBox1.Size);
            bit.Save("D:\\" + DateTime.Now.ToString("HHmmss") + ".jpg");//保存图片

        }
    }
   

}