png

outputting from autocad to a png file for my web page.
autocad 2000 using a hdi driver, whose origion I cannot recall.
I need the floor plan to be transparent.
currently, I plot to PNG and grab the file with Irfanview, save as an
interlaced GIF, with limited success.
ONE OF THE THINGS I HAD TO DO TO MAKE IT WORK was set my background in
autocad to white before I plotted. (there were many other things too)
anyway, some of my first attempts, what looked like a white background
in the PNG file was actually RGB of 2 4 2, or within spitting distance.
there are a great many puzzles here for me. I will have fun this
weekend. but anybody that can shed any light on any portion of the
process, well, info would be greatly appreciated.
thanks,
roy