Win32 GDI - Need help Adding a bitmap to this example

Firstly, I'd like to say hello to everyone here! I have found a lot of useful information on this website and hope to learn a lot more during my stay 🙂

I've been reading theForger's Win32 API tutorial and want to use it as a base for simple games/demos. Using the following code, I've got a ball bouncing around the window using double buffering, but I've been trying to add another bitmap as a background image, without much success. Can someone show me how it's done? Where is the best place to put a …