C#开发的播放器源码

使用DirectX技术实现播放，需要引用系统的 C:\WINNT\system32\quartz.dll 


using System; 
using System.Collections; 
using System.ComponentModel; 
using System.Drawing; 
using System.Data; 
using System.Windows.Forms; 
using QuartzTypeLib; 

namespace Greystar.FrameWork.ToolKits 
{ 
/// <summary> 
/// FrmTV 的摘要说明。 
/// </summary> 
public class FrmTV : System.Windows.Forms.UserControl 
{ 
private System.Windows.Forms.ToolBar toolBar1; 
private System.Windows.Forms.ToolBarButton toolBarButton1; 
private System.Windows.Forms.ToolBarButton toolBarButton2; 
private System.Windows.Forms.ToolBarButton toolBarButton3; 
private System.Windows.Forms.Panel panel1; 
private System.Windows.Forms.ImageList imageList1; 
private System.Windows.Forms.Timer timer1; 
private System.Windows.Forms.ToolBarButton toolBarButton4; 
private System.ComponentModel.IContainer components; 

private const int WM_APP = 0x8000; 
private const int WM_GRAPHNOTIFY = WM_APP + 1; 

private const int EC_COMPLETE = 0x01; 
private const int WS_CHILD = 0x40000000; 
private const int WS_CLIPCHILDREN = 0x2000000; 

private FilgraphManager m_objFilterGraph = null; 
private IBasicAudio m_objBasicAudio = null; 
private IVideoWindow m_objVideoWindow = null; 
private IMediaEvent m_objMediaEvent = null; 
private IMediaEventEx m_objMediaEventEx = null; 
private IMediaPosition m_objMediaPosition = null; 
private IMediaControl m_objMediaControl = null; 
private System.Windows.Forms.StatusBar statusBar1; 
private System.Windows.Forms.StatusBarPanel statusBarPanel1; 
private System.Windows.Forms.StatusBarPanel statusBarPanel2; 
private System.Windows.Forms.StatusBarPanel statusBarPanel3; 

enum MediaStatus { None, Stopped, Paused, Running }; 

private MediaStatus m_CurrentStatus = MediaStatus.None; 

public FrmTV() 
{ 
// 该调用是 Windows.Forms 窗体设计器所必需的。 
InitializeComponent(); 

// TODO: 在 InitializeComponent 调用后添加任何初始化 

} 
public FrmTV(EnvDTE._DTE dte,string workpath) 
{