I want to learn how to draw shapes with wxWidgets. Where do I start? In case there are multiple ways, I prefer ease of use over cross-platform compatibility. I'm a Windows user.
This is done by creating a wxPanel, connecting to the paint event, and using the DC provided in that paint event to draw various things.
The DC has a number of drawing related functions. This will probably be using Windows GDI or something similar, which means performance probably won't be fantastic, but it should work for simple purposes. You can find a tutorial with sample code on the Wiki. Look for the documentation for the wxDC class to see a list of drawing functions you can use.
If you need something with more performance, look into the wxGLCanvas which renders a hardware accelerated OpenGL canvas.