这里是WMP的版本ClassID，从WMP7后ID就成了clsid:6BF52A52-394A-11D3-B153-00C04F79FAA6，之前的6.4为clsid:22D6F312-B0F6-11D0-94AB-0080C74C7E95，但是之前的版本还是可以用的，只不过新功能用不了罢了。
下面这个是具体的版本号，你可以对比一下你现在的是什么版本。
版本号 Windows Media Player (WMP) 的版本
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5.1.51.421 WMP 5.2 Beta
5.1.52.701 WMP 5.2
6.02.902 WMP 6.0
6.1.5.130 WMP 6.0 Internet Explorer 5 RC0 Beta
6.1.7.217 WMP 6.0
6.2.5.410 WMP 6.2 Beta
6.4.5.809 WMP 6.4
6.4.6.* WMP 6.4 for Windows 2000 Beta
6.4.7.1028 WMP 6.4，具有多位速率 (MBR) 更新，用于Internet Explorer
6.4.7.1112 WMP 6.4，具有 MBR 更新（在 6.4.7.1028 的基础上对错误消息进行了较小更新）
6.4.9.* WMP 6.4，仅用于 Windows 2000
7.0.0.1954 WMP 7
7.0.0.1958 WMP 7 更新
7.0.0.1956 WMP 7，更新了安装程序
7.0.0.1440 WMP 7，用于 Windows Millennium Edition (Me)
7.01.00.3055 WMP 7.1
8.00.00.4477 WMP for Windows XP
9.00.00.2980 WMP 9 系列，用于 Windows XP、Windows 98 Second Edition、Windows Me 和 Windows 2000
9.00.00.2991 WMP 9 系列，用于 Windows Server 2003
10.00.00.3646 WMP 10
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官方的插入方式真够简单的，我都有点想踹他们两脚，
<OBJECT ID="Player"
CLASSID="CLSID:6BF52A52-394A-11d3-B153-00C04F79FAA6">
<PARAM name="autoStart" value="True">
</OBJECT>
下面是具体参数在不同浏览器的可用性，这个东东真是太有用了，好多参数用了不起作用，我都测试的快疯了，一看这个列表，原来人家压根不支持，晕...
| PARAM name | Internet Explorer | Firefox with mime type application/x-ms-wmp | Firefox with any other mime type |
| autoStart | yes | yes | yes |
| balance | yes | yes | yes |
| baseURL | yes | yes | yes |
| captioningID | yes | yes | yes |
| currentMarker | yes | yes | yes |
| currentPosition | yes | yes | yes |
| defaultFrame | yes | no | no |
| enableContextMenu | yes | yes | yes |
| enabled | yes | yes | yes |
| enableErrorDialogs | yes | yes | no |
| fileName | no | yes | yes |
| fullScreen | yes | no | no |
| invokeURLs | yes | no | no |
| mute | yes | yes | yes |
| playCount | yes | yes | no |
| rate | yes | yes | yes |
| SAMIFileName | yes | yes | yes |
| SAMILang | yes | yes | yes |
| SAMIStyle | yes | yes | yes |
| SRC | no | yes | yes |
| stretchToFit | yes | yes | no |
| URL | yes | yes | yes |
| volume | yes | yes | yes |
| windowlessVideo | yes | yes | yes |
参数的默认值：
| AudioStream | true | |
| AutoSize | true | |
| AutoStart | true | Sets if the player should start automatically |
| AnimationAtStart | true | Sets if an animation should show while the file loads |
| AllowScan | true | |
| AllowChangeDisplaySize | true | |
| AutoRewind | false | |
| Balance | false | |
| BaseURL | ||
| BufferingTime | 5 | |
| CaptioningID | ||
| ClickToPlay | true | Sets if the player should start when the user clicks in the play area |
| CursorType | false | |
| CurrentPosition | true | |
| CurrentMarker | false | |
| DefaultFrame | ||
| DisplayBackColor | false | |
| DisplayForeColor | 16777215 | |
| DisplayMode | false | |
| DisplaySize | false | |
| Enabled | true | |
| EnableContextMenu | true | |
| EnablePositionControls | true | |
| EnableFullScreenControls | false | |
| EnableTracker | true | |
| Filename | URL | The URL of the file to play |
| InvokeURLs | true | |
| Language | true | |
| Mute | false | |
| PlayCount | 1 | |
| PreviewMode | false | |
| Rate | 1 | |
| SAMILang | ||
| SAMIStyle | ||
| SAMIFileName | ||
| SelectionStart | true | |
| SelectionEnd | true | |
| SendOpenStateChangeEvents | true | |
| SendWarningEvents | true | |
| SendErrorEvents | true | |
| SendKeyboardEvents | false | |
| SendMouseClickEvents | false | |
| SendMouseMoveEvents | false | |
| SendPlayStateChangeEvents | true | |
| ShowCaptioning | false | |
| ShowControls | true | Sets if the player controls should show |
| ShowAudioControls | true | Sets if the audio controls should show |
| ShowDisplay | false | Sets if the display should show |
| ShowGotoBar | false | Sets if the GotoBar should show |
| ShowPositionControls | true | |
| ShowStatusBar | false | |
| ShowTracker | true | |
| TransparantAtStart | false | |
| VideoBorderWidth | false | |
| VideoBorderColor | false | |
| VideoBorder3D | false | |
| Volume | -200 | |
| WindowlessVideo | false |
可能你最想知道的是怎么用程序（我偏向用JS）来控制WMP的播放、停止、快进吧，看看这里吧，http://msdn.microsoft.com/en-us/library/dd564034%28VS.85%29.aspx，有详细的说明和例子。（英文的）