A colleage recently got this error while compiling unknown.idl:
 
1>C:\Program Files\Microsoft SDKs\Windows\v6.0\Include\unknwn.idl(108) : error MIDL2025 : syntax error : expecting ] or , near "annotation"
1>C:\Program Files\Microsoft SDKs\Windows\v6.0\Include\unknwn.idl(108) : error MIDL2026 : cannot recover from earlier syntax errors; aborting compilation
 
If you get this error, you are using a new version of the Windows headers with an older version of the MIDL compiler.
 
Fix:
 
1. Make sure you installed the MIDL compiler when you installed the latest Windows SDK. It should appear under "Program Files\Microsoft SDKs\Windows\v6.0\Bin".
 
Note: To install the MIDL compiler, you need to select Developer Tools / Windows Development Tools / Win32 Development Tools in the Windows SDK setup wizard. (At least, as of RC1.)
 
2. In Visual Studio, under Tools > Options > Projects and Solutions > VC++ Directories > Executable Files, add
 
    x:\Program Files\Microsoft SDKs\Windows\v6.0\bin
 
to the top of the list.

 
 
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