Recompiled and old program in VS2005 and got many errors

[Netter]

I wrote a vc program many years ago. When I got VS2003 I recompiled it and
it compiled OK.

I just got VS2005 and tried to recompile it just to see if it would and got
many errors.

For example in some .obj files:
Error 2 error LNK2001: unresolved external symbol _strstr
Error 3 error LNK2019: unresolved external symbol _ceil referenced in
function _ceilf
Error 12 error LNK2001: unresolved external symbol ___security_cookie

Also in a .lib file
Error 47 error LNK2001: unresolved external symbol __itoa in
OLDNAMES.lib

Got any idea why these show up now?

Thanks