Using your favorite tool editor, in my case vim, create two files with the next content:
teststaticlib.cpp
///
extern “C” int Test 
{ 
    return 123;
}
///
teststaticapp.cpp
///
#include <iostream>
extern “C” int Test();
int main()
{
  std::cout << Test() << std::endl;
}
///
To build follow the next steps:
///
1)  cl -c teststaticlib.cpp
///
  ( -c stands for “compiles without linking”)
///
2)  lib teststaticlib.obj
///
And the final step is 
///
3)  cl teststaticapp.cpp teststaticlib.lib
///
Now you can try the exe file just generated.
Enjoy!
NOTE: To check an example using Visual Studio 2012 you may follow this link:
 Static linking with Visual Studio