This is a minimal framework that can be used as a starting point to build 4kb games or demos. It does the basics of creating a window, setting up double buffering and running a game loop at a fixed rate. It provides the bare minimum but it's easy to extend.
Using Crinkler, it compiles to a 1kb executable.
See also 4k-Example for a simple demo and 4kGL for the same thing using OpenGL instead of GDI.
There are batch files the Source folder that compile the project using MSVC (with the default linker or Crinkler) and MinGW. It has been tested using MSVC 2010/2012/2013/2014 CTP and MinGW 4.8.1+ on Windows 7 and 8 (both x86 and x86-64).
It's also possible to build it using other compilers, such as Clang (LLVM 3.6+) or to cross-compile (e.g. from Debian using MinGW), but this is not supported.
There is another 1k/4k framework done by Iñigo Quilez. It's more mature and has been used in more productions than this one. The main difference between both is that iq's framework uses every known trick to keep the final size small. This one tries to be clean and simple without ugly hacks.
This program is finished!
4k is feature-complete and has no known bugs. Unless issues are reported I plan no further development on it other than maintenance.
Like all my hobby projects, this is Free Software. See the Documentation folder for more information. No warranty though.