SystemParametersInfo function...HELP!

I'm trying to change the WIN95
wallpaper on the fly using the
SystemParametersInfo function.  I'm
assuming that I use the
SPI_SETDESKWALLPAPER parameter.
Now... the question is...what exactly
is the format for using this function?
 Anyone have an example?  Could you
e-mail please?  Oh, and thanx in
advance!

Kevin