a bug with atldlgs.h?undeclared identifier IID_IShellLink when I use<initguid.h>

my project is OK before I #include < Initguid.h> in "stdafx.h", after I include initguid.h, I got the following compiler error:


1>d:\mywtl80\include\atldlgs.h(820) : error C2065: ¡°IID_IShellLink¡±: δÉùÃ÷µÄ±êʶ·û undeclared identifier
1>        d:\mywtl80\include\atldlgs.h(737): ±àÒëÀà Ä£°å ³ÉÔ±º¯Êý¡°void WTL::CMultiFileDialogImpl<T>::OnSelChange(LPOFNOTIFY)¡±Ê±
1>        with
1>        [
1>            T=WTL::CMultiFileDialog
1>        ]
1>        d:\mywtl80\include\atldlgs.h(866): ²Î¼û¶ÔÕýÔÚ±àÒëµÄÀà Ä£°å ʵÀý»¯¡°WTL::CMultiFileDialogImpl<T>¡±µÄÒýÓÃ
1>        with
1>        [
1>            T=WTL::CMultiFileDialog
1>        ]

following is the code, 
							// Bind to its IShellLink interface.
							ATL::CComPtr<IShellLink> pLink;
							if (SUCCEEDED(pFolder->BindToObject(pidl, NULL, IID_IShellLink, (void**)&pLink)))

but without <initguid.h>, nothing is wrong, I wonder if there is some #define #ifndef etc bug or error in Atldlgs.h???

any one else have ever got this problem?



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