You might look into SDL, a commonly used library for 2D and 3D graphical apps and games. It can handle the details of getting a window on screen, receiving input etc. and is a lot simpler to use than the bare Windows API or other platform APIs. For graphics, SDL itself only provides 2D image loading and blitting (i.e. sprites), but it can also give you access to OpenGL to do hardware accelerated 3D graphics.
You could also look at the NeHe tutorials on OpenGL (click the "Lessons 01-05" and other links on the right side). These show how to use the Windows API directly to create a window, get OpenGL running, and do some basic input handling.
Or, if Direct3D is more your thing, you can certainly find plenty of tutorials online about getting that up and running in a window as well.
Finally, you might want to pick up a book on OpenGL or D3D, instead of relying on internet tutorials. That might give you a smoother and certainly more complete introduction to the subject.