Hi, I download the boost build compressed package from boost site. And try to build a simple COM project which is migrate from VS2005, OS platform is Win2000 sp4.
The project was built succeed in VS2005.

Content of Jamroot file below:
-------------------------------------------------------------
exe OSAutoConfig
:
    dbg.cpp
    OSAutoConfig.cpp
:
    <include>.
    <include>C:/"Program Files"/"Microsoft Visual Studio 8"/VC/PlatformSDK/Include/
    <file>C:/"Program Files"/"Microsoft Visual Studio 8"/VC/PlatformSDK/Lib/ole32.lib
    <define>_UNICODE
    <define>UNICODE
;
---------------------------------------------------------------
The project path is c:\boost-build\example\BIDI_EXE.
VS2005 is already installed.

And compile error message is:
OSAutoConfig.cpp(128) : error C2065: 'COINIT_MULTITHREADED' : undeclared identifier
OSAutoConfig.cpp(128) : error C3861: 'CoInitializeEx': identifier not found

I feel so confused, because in file OSAutoConfig.obj.rsp the corresponding path has aleady appended.
Content of OSAutoConfig.obj.rsp file below:
-------------------------------------------------------------------
"OSAutoConfig.cpp" -Fo"bin\msvc-8.0\debug\OSAutoConfig.obj"   -TP /Z7 /Od /Ob0 /W3 /GR /MDd /Zc:forScope /Zc:wchar_t /wd4675 /EHs -c
-DUNICODE
-D_UNICODE
"-I."
"-IC:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\Include"
----------------------------------------------------------------------

Leo