Window DC's

[coldfusion244]

I am attempting to teach myself DCs, these from what I understand can be anything from a window to a printer, monitor, etc. As an experiment to try and learn it, I want to grab the background image or color of the desktop and change it to some random color or colors. This is what I was thnking:

PseudoCode

Start
Grab hWnd
Grab DC
CreateBitmap
Toggle Bitmap Colors?
Write Bitmap to DC using BitBlt?
Release DC
End

Does that look like itll work? I havent used bitmaps before either, so hopefully itll be a good learning tool. I am using Unmanaged C++.