wxSmith is just a code generator and it generates wxWidgets code.
So, if your project has been setup for wxWidgets, it will work with wxSmith.
I've never used wxPack, but I guess you have to inspect the install of wxPack, you need to search for .dll and .a files. Then depending on your project settings (what wx config you're using) different libraries should be used.
You can use depends.exe and nm + grep to see what symbols every library file provides.
Linking an application to wx is tough task, especially for a beginner.