You've done most of the work already.
Have you looked it up on MSDN? It will tell you what the parameters mean, and also what library it's in (e.g. kernel32.dll, user32.dll, etc)
As for setting the background color, you'll have to use GDI functions FillRect (I think), GetDC, etc. You'll also have to do it once per frame unless you can catch the WM_PAINT messages.
I've got an example -- I did this once -- but not on this computer.
Have you looked it up on MSDN? It will tell you what the parameters mean, and also what library it's in (e.g. kernel32.dll, user32.dll, etc)
As for setting the background color, you'll have to use GDI functions FillRect (I think), GetDC, etc. You'll also have to do it once per frame unless you can catch the WM_PAINT messages.
I've got an example -- I did this once -- but not on this computer.