error LNK2001: unresolved external symbol _CLSID_URL_SRC_FILTER
在做DirectShow开发，做流媒体播放，调试遇到问题。。。

LINK : warning LNK4098: defaultlib "LIBCMTD" conflicts with use of other libs; use /NODEFAULTLIB:library
CDXGraph.obj : error LNK2001: unresolved external symbol _CLSID_URL_SRC_FILTER
Debug/DirectShow_1.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

求高手帮忙解决一下~
[解决办法]
http://blog.csdn.net/vocanicy/article/details/2449691
[解决办法]
_CLSID_URL_SRC_FILTER是个什么？变量？