i don't wonder, why your project doesn't build,
you don't have any wxWidgets library at all in your libs directory 
 Volume in drive C has no label.
 Volume Serial Number is 4C72-D410
 Directory of C:\wxWidgets-2.6.2\lib\gcc_dll
01/27/2006  03:42 PM    <DIR>          .
01/27/2006  03:42 PM    <DIR>          ..
01/27/2006  03:20 PM    <DIR>          msw
               0 File(s)              0 bytes
               3 Dir(s)  71,395,835,904 bytes free
[edit]
in your case, ANSI build only, it should look like 
 Directory of C:\wxWidgets-2.6.2\lib\gcc_dll
2005.12.30  01:07    <DIR>          .
2005.12.30  01:07    <DIR>          ..
2006.01.01  17:25    <DIR>          msw
2006.01.01  17:27           158.734 libwxexpat.a
2006.01.01  17:26           146.784 libwxjpeg.a
2006.01.01  17:52        13.106.452 libwxmsw26.a
2006.01.01  17:26           169.592 libwxpng.a
2006.01.01  17:26            79.110 libwxregex.a
2006.01.01  17:26           327.646 libwxtiff.a
2006.01.01  17:26            73.036 libwxzlib.a
2006.01.01  17:53         9.577.786 wxmsw26_gcc.dll
[edit2]
if you have the wxwidgets object files still on your harddisk,
open a command prompt,
navigate to 
C:\wxWidgets-2.6.2
and run the make process again
cd build\msw
mingw32-make -f makefile.gcc BUILD=release SHARED=1 MONOLITHIC=1 USE_XRC=1 UNICODE=0
this will rebuild the libraries