1. </blockquote></div><div class="blockcode"><blockquote>using System;
   
2. using System.Runtime.InteropServices;
   
3. using System.Text;
   
4. using System.IO ;
   
5. using System.Windows.Forms;
   
6. namespace WindowsApplication7
   
7. {
   
8. /// <summary>
   
9. /// clsMci 的摘要说明。
   
10. /// </summary>
    
11. 　public class clsMCI
    
12. {
    
13. public clsMCI()
    
14. {
    
15. //
    
16. // TODO: 在此处添加构造函数逻辑
    
17. //
    
18. 　　}
    
19. 
    
20. //定义API函数使用的字符串变量
    
21. 　　[MarshalAs(UnmanagedType.ByValTStr,SizeConst=260)]
    
22. private string Name = "" ;
    
23. [MarshalAs(UnmanagedType.ByValTStr,SizeConst=128)]
    
24. private string durLength = "" ;
    
25. [MarshalAs(UnmanagedType.LPTStr,SizeConst=128)]
    
26. private string TemStr ="";
    
27. int ilong;
    
28. //定义播放状态枚举变量
    
29. 　　public enum State
    
30. {
    
31. mPlaying = 1,
    
32. mPuase = 2,
    
33. mStop = 3
    
34. };
    
35. //结构变量
    
36. 　　public struct structMCI
    
37. {
    
38. public bool bMut;
    
39. public int iDur;
    
40. public int iPos;
    
41. public int iVol;
    
42. public int iBal;
    
43. public string iName;
    
44. public State state;
    
45. };
    
46. 
    
47. public structMCI mc =new structMCI() ;
    
48. 
    
49. //取得播放文件属性
    
50. 　　public string FileName
    
51. {
    
52. get
    
53. {
    
54. return mc.iName;
    
55. }
    
56. set
    
57. {
    
58. //ASCIIEncoding asc = new ASCIIEncoding();
    
59. 　　　　try
    
60. {
    
61. TemStr ="";
    
62. TemStr = TemStr.PadLeft(127,Convert.ToChar(" "));
    
63. Name = Name.PadLeft(260,Convert.ToChar(" ")) ;
    
64. mc.iName = value;
    
65. ilong = APIClass.GetShortPathName(mc.iName,Name, Name.Length);
    
66. Name = GetCurrPath(Name);
    
67. //Name = "open " + Convert.ToChar(34) + Name + Convert.ToChar(34) + " alias media";
    
68. 　　　　　Name = "open " + Convert.ToChar(34) + Name + Convert.ToChar(34) + " alias media";
    
69. ilong = APIClass.mciSendString("close all", TemStr, TemStr.Length , 0);
    
70. ilong = APIClass.mciSendString( Name, TemStr, TemStr.Length, 0);
    
71. ilong = APIClass.mciSendString("set media time format milliseconds", TemStr, TemStr.Length , 0);
    
72. mc.state = State.mStop;
    
73. }
    
74. catch
    
75. {
    
76. }
    
77. }
    
78. }
    
79. //播放  http://sosoft.cnblogs.com/
    
80. 　　public void play()
    
81. {
    
82. TemStr = "";
    
83. TemStr = TemStr.PadLeft(127,Convert.ToChar(" "));
    
84. APIClass.mciSendString("play media", TemStr, TemStr.Length , 0);
    
85. mc.state = State.mPlaying ;
    
86. }
    
87. //停止
    
88. 　　public void StopT()
    
89. {
    
90. TemStr = "";
    
91. TemStr = TemStr.PadLeft(128,Convert.ToChar(" "));
    
92. ilong = APIClass.mciSendString("close media", TemStr, 128, 0);
    
93. ilong = APIClass.mciSendString("close all", TemStr, 128, 0);
    
94. mc.state = State.mStop ;
    
95. }
    
96. 
    
97. public void Puase()
    
98. {
    
99. TemStr = "";
    
100. TemStr = TemStr.PadLeft(128,Convert.ToChar(" "));
     
101. ilong = APIClass.mciSendString("pause media", TemStr, TemStr.Length, 0);
     
102. mc.state = State.mPuase ;
     
103. }
     
104. private string GetCurrPath(string name)
     
105. {
     
106. if(name.Length <1) return "";
     
107. name = name.Trim();
     
108. name = name.Substring(0,name.Length-1);
     
109. return name;
     
110. }
     
111. //总时间
     
112. 　　public int Duration
     
113. {
     
114. get
     
115. {
     
116. durLength = "";
     
117. durLength = durLength.PadLeft(128,Convert.ToChar(" ")) ;
     
118. APIClass.mciSendString("status media length", durLength, durLength.Length, 0);
     
119. durLength = durLength.Trim();
     
120. if(durLength == "") return 0;
     
121. return (int)(Convert.ToDouble(durLength) / 1000f);
     
122. }
     
123. }
     
124. 
     
125. //当前时间
     
126. 　　public int CurrentPosition
     
127. {
     
128. get
     
129. {
     
130. durLength = "";
     
131. durLength = durLength.PadLeft(128,Convert.ToChar(" ")) ;
     
132. APIClass.mciSendString("status media position", durLength, durLength.Length, 0);
     
133. mc.iPos = (int)(Convert.ToDouble(durLength) / 1000f);
     
134. return mc.iPos;
     
135. }
     
136. }
     
137. }
     
138. 
     
139. public class APIClass
     
140. {
     
141. [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
     
142. public static extern int GetShortPathName (
     
143. string lpszLongPath,
     
144. string shortFile,
     
145. int cchBuffer
     
146. );
     
147. 
     
148. [DllImport("winmm.dll", EntryPoint="mciSendString", CharSet = CharSet.Auto)]
     
149. public static extern int mciSendString (
     
150. string lpstrCommand,
     
151. string lpstrReturnString,
     
152. int uReturnLength,
     
153. int hwndCallback
     
154. );
     
155. }
     
156. }

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请问怎么用呀?