Hello, I'm trying to build Qt Webkit under msvc 2003, for this i maked some modifications in Webkit sources (because i had some compiles errors), the compile works, but on the link step i had errors like: Microsoft (R) Program Maintenance Utility Version 7.10.3077 Copyright (C) Microsoft Corporation. All rights reserved. link /LIBPATH:"c:\Qt\4.4.0\lib" /LIBPATH:"c:\Qt\4.4.0\lib" /NOLOGO /DEBU G /DLL /VERSION:4.40 /OUT:..\..\..\..\lib\QtWebKitd4.dll @C:\DOCUME~1\derdouri\L OCALS~1\Temp\nm132.tmp Creating library ..\..\..\..\lib\QtWebKitd4.lib and object ..\..\..\..\lib\Qt WebKitd4.exp RenderBox.obj : error LNK2001: unresolved external symbol "class WebCore::Qualif iedName const WebCore::HTMLNames::frameTag" (?frameTag@HTMLNames@WebCore@@3VQual ifiedName@2@B) HTMLNames.obj : error LNK2001: unresolved external symbol "class WebCore::Qualif iedName const WebCore::HTMLNames::frameTag" (?frameTag@HTMLNames@WebCore@@3VQual ifiedName@2@B) HTMLFrameSetElement.obj : error LNK2001: unresolved external symbol "class WebCo re::QualifiedName const WebCore::HTMLNames::frameTag" (?frameTag@HTMLNames@WebCo re@@3VQualifiedName@2@B) FrameLoader.obj : error LNK2001: unresolved external symbol "class WebCore::Qual ifiedName const WebCore::HTMLNames::frameTag" (?frameTag@HTMLNames@WebCore@@3VQu alifiedName@2@B) EventHandler.obj : error LNK2001: unresolved external symbol "class WebCore::Qua lifiedName const WebCore::HTMLNames::frameTag" (?frameTag@HTMLNames@WebCore@@3VQ ualifiedName@2@B) Frame.obj : error LNK2001: unresolved external symbol "class WebCore::QualifiedN ame const WebCore::HTMLNames::frameTag" (?frameTag@HTMLNames@WebCore@@3VQualifie dName@2@B) CSSStyleSelector.obj : error LNK2001: unresolved external symbol "class WebCore: :QualifiedName const WebCore::HTMLNames::frameTag" (?frameTag@HTMLNames@WebCore@ @3VQualifiedName@2@B) HTMLBodyElement.obj : error LNK2001: unresolved external symbol "class WebCore:: QualifiedName const WebCore::HTMLNames::frameTag" (?frameTag@HTMLNames@WebCore@@ 3VQualifiedName@2@B) ........ ........ ........ Any ideas to resolve link problems thank for your help Rachid.