DerectX7实现播放音乐效果

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

using DxVBLib;

namespace 播放音乐
{
 ///

 /// Form1 的摘要说明。
 ///

 public class Form1 : System.Windows.Forms.Form
 {
  ///

  /// 必需的设计器变量。
  ///

  private System.ComponentModel.Container components = null;

  public Form1()
  {
   //
   // Windows 窗体设计器支持所必需的
   //
   InitializeComponent();

   
   directX=new DirectX7Class();
   performance=directX.DirectMusicPerformanceCreate();
   composer=directX.DirectMusicComposerCreate();
   loader=directX.DirectMusicLoaderCreate();

   performance.Init(null,0);
   performance.SetPort(-1,4);
   performance.SetMasterAutoDownload(true);

   
   //chordMap=loader.LoadChordMap(@"F:/游戏音乐(mid)/GAME01FM.MID");
   try
   {
    chordMap=loader.LoadChordMap("CHORDMAP.CDM");
   }
   catch (Exception)
   {
    MessageBox.Show("Could not load ChordMap."+"Please ensure that CHORDMAP.CDM is"+"in the directory of this exectutable.");
   }

   //
   // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
   //
  }

  ///

  /// 清理所有正在使用的资源。
  ///

  protected override void Dispose( bool disposing )
  {
   if( disposing )
   {
    if (components != null)
    {
     components.Dispose();
    }
   }
   base.Dispose( disposing );
  }

  #region Windows 窗体设计器生成的代码
  ///

  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  ///

  private void InitializeComponent()
  {
   this.button1 = new System.Windows.Forms.Button();
   this.SuspendLayout();
   //
   // button1
   //
   this.button1.Location = new System.Drawing.Point(96, 192);
   this.button1.Name = "button1";
   this.button1.TabIndex = 0;
   this.button1.Text = "button1";
   this.button1.Click += new System.EventHandler(this.button1_Click);
   //
   // Form1
   //
   this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
   this.ClientSize = new System.Drawing.Size(292, 266);
   this.Controls.Add(this.button1);
   this.Name = "Form1";
   this.Text = "Form1";
   this.ResumeLayout(false);

  }
  #endregion

  ///

  /// 应用程序的主入口点。
  ///

  private DirectX7 directX;
  private DirectMusicChordMap chordMap;
  private DirectMusicComposer composer;
  private DirectMusicPerformance performance;
  private DirectMusicSegment segment;
  private DirectMusicLoader loader;
  private System.Windows.Forms.Button button1;
  private DirectMusicStyle style;
  [STAThread]
  static void Main()
  {
   Application.Run(new Form1());
  }
  private void button1_Click(object sender, System.EventArgs e)
  {   
   try
   {
    style=loader.LoadStyle(@"F:/游戏音乐(mid)/GAME01FM.MID");
    segment=composer.ComposeSegmentFromShape(style,64,0,2,false,false,chordMap);
    composer.AutoTransition(performance,segment,(int)CONST_DMUS_COMMANDT_TYPES.DMUS_COMMANDT_FILL,(int)CONST_DMUS_COMPOSEF_FLAGS.DMUS_COMPOSEF_IMMEDIATE,chordMap);
   }
   catch(Exception)
   {
    MessageBox.Show("不能播放音乐");
   }
  }
 }
}

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