怎么找不到Interop.WMPLib这个引用
听说在COM组件里,但是我没找到.VS2005和2008都没找到.

------解决方案--------------------
The following is the walkthrough to use a Windows Media Player COM 
component in a WinForms application.

1. If the Windows Media Player COM component is not present in the Toolbox, 
right-clikc on the Toolbox and choose 'Choose Items'. In the 'Choose 
Toolbox Items' dialog, switch to the 'COM Components' tab. Navigate to 
'Windows Media Player' (whose path is 'c:\Windows\system32\wmp.dll') and 
select the checkbox before this item. Press OK.

2. Drag&drop the Window Media Player COM component from Toolbox onto a 
form. At this time, VS IDE will generate wrapper classes for this COM 
component automatically. COM components are not managed, so we couldn't use 
them directly in .NET applications.

If you expand the Reference node under the project node in the Solution 
Explorer, you should see two references called 'AxWMPLib' and 'WMPLib' are 
added.

3. You may add the following code to the form:

private void Form1_Load(object sender, EventArgs e)
{
// the 'axWindowsMediaPlayer1' is the name of the Windows Media Player 
COM component on the form
MessageBox.Show(this.axWindowsMediaPlayer1.versionInfo);
this.axWindowsMediaPlayer1.URL = "the path of the video/audio file";
}

4. Build the project. Go to the bin\debug folder of the application and you 
should see two files called 'AxInterop.WMPLib.dll' and 
'Interop.WMPLib.dll', which are the dll files that contain the wrapper 
classes for the Windows Media Player COM component.