visual studio 2008 library files vs

[foobar8675]

i started playing with directx in visual studio 2008 where i included the
tools->
options->
projects and solutions->
vc++ directories ->
show directories for library files

and included the path to the directx libs. i was confused when getting linker errors. i then included the

project properties ->
configuration properties ->
linker->
input->
additional dependies ->d3d10.lib d3dx10d.lib

and the linker errors were gone. now why would i have to include additional lib dependenies since they were already included in the library path?

[Bazzy]

Because you have to tell the compiler to link to that library and Visual Studio IDE does it that way
1^st = Tell where libraries are located (For all the projects)
2^nd = Tell that the specific project is using them